Windows Support Forum

Is PC133 Memory backwards compatible to PC100 slot? {SOLVED}

Q: Is PC133 Memory backwards compatible to PC100 slot? {SOLVED}

I put a stick in...(256) and macine only counts it as 128...what gives. I was told PC133...would work in PC100 boards. Was I lied to?

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Preferred Solution: Is PC133 Memory backwards compatible to PC100 slot? {SOLVED}

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A: Is PC133 Memory backwards compatible to PC100 slot? {SOLVED}
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yes or no ?? will this have a bad effect on the computer ?/ any info is appreciated

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I am wondering if my type of RAM might be causing me problems I have the following installed Slot Memory Module Properties Module Name Infineon HYS V GU- Serial Number C h Module Size MB rows banks Module Type Unbuffered Memory Type SDRAM Memory Speed PC MHz Module Width PC133 - Compatible? PC100 & bit Module Voltage LVTTL Error Detection Method None Refresh Rate Reduced us Self-Refresh Highest CAS Latency ns MHz nd Highest CAS Latency ns MHz Slot Memory Module Properties Serial Number None Module Size MB rows banks Module Type Unbuffered Memory Type SDRAM Memory Speed PC MHz Module Width PC100 & PC133 - Compatible? bit Module Voltage LVTTL Error Detection Method None Refresh Rate Normal us Self-Refresh Highest CAS Latency ns MHz nd Highest CAS Latency ns MHz Slot Memory Module Properties Module Name Smart Modular - Serial Number E h Module Size MB rows banks Module Type Unbuffered Memory Type SDRAM Memory Speed PC MHz Module Width bit Module Voltage LVTTL Error Detection Method None Refresh Rate Normal us Self-Refresh Highest CAS Latency ns MHz nbsp

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I have used Belarc to check my motherboard, processor etc.
It said my FSB was 133 Mhz
It also said my Dimm currently fitted was 100Mhz Sdramm (2 x 128)

So..i think mistakingly i thought it would be ok to buy a 256md sdram PC133....however, the system only sees it as 123 giving me a total of approx 383.

IS this obviois or is there a setting i should alter OR have i bought the wrong type and need PC100

Any help much appreciated


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I've seen some PC100 memory sticks for sale in my local paper. The problem is that my motherboard has a bus speed of 133Mhz. Is it worth me buying the chips and trying them out?

A:Can PC100 memory work on a PC133 Motherboard?

Right up front they will run slower and if you have pc133 Ram in there now it will slow them to 100 mhz. If they are cheap enough why not give it a try. You could probably take them back.
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Hi. I recently installed a 128MB PC133 SDRAM unit on my motherboard. Now my Windows98 system only uses that 128MB and ignores my 64MB PC100 card. If I swap the two cards positions, then I get the 64MB w/o the 128. When I go into CMOS, I find that the only two RAM speed settings are 10ns and 12ns. Changing from one to the other has no effect on the either/or SDRAM problem. How can I get the full 192MB SDRAM useable all at once? Thanks in advance for your advice.


A:{SOLVED} PC133 - PC100 SDRAM compatibility

Same problem occurs if you tried to mix 100 mhz with 66 mhz Ram. Only the one in the first slot will work. The only way to get around it, at that time, was to make sure you bought 100/66 mhz ram. I'm afraid you are going to have to buy your memory to conform to the existing memory, or junk the existing, and buy all new memory.
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I am upgrading a Demension 4300 w/ a 1.4gig P4 actual speed is 1395.
Crucial says it uses PC133 which it now has. BIOS says the bus speed is 100mz.
IF i put in PC100 will it work at 100 or 133 or not at all?

A:PC133 or PC100 RAM?

Hi jlrka,
if you put ram of mixed speeds in the same machine, say 100 and 133. it will all run at the speed of the slowest module (100Mhz) in this case. unless the compatibility of the motherboard has other caveats. check the manufacturers ram support list for that.
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I've just purchased two 256mb sdram PC133's from my local shop. I took in a PC100 ram for reference.

I put one of the sticks in my computer, which already had a 128 stick in (PC100) and the 256 started to smoke. I quickly took it out and luckily my computer is still working!

I put the other in my mates computer and it wouldn't run thru the usual start up sequence. Her old RAM was broken so she didn't have anything in the computer at all.

My question is, did the shop sell me the wrong type of ram - should I have bought PC100's or would the PC133's work? If they will work, why did mine smoke and her's not run at all?

Thanks in advance,


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i have a laptop that as far as i understood was compatible with pc100 ram. ive alot of people saying to get pc133. are these two backwards compatible with each other or are they just smoking crack? my laptop is a toshiba tecra 8100 with 256mb of pc100 currently and a 800mhz processor. thanks.

A:pc100 or pc133

PC133 RAM is backward compatible with PC100. In other words it will run at 100Mhz speed. However, PC100 will not run at 133Mhz. I suggest that you go to and look up your laptop to see what it will support before buying any.

Good luck.

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Hi all question I was running mb RAM pc on my computer I thought that my memory went bad because of everything went very slow on me and i woule get memory errors i swaped my ram with another stick of mb but it was pc same problem it turns out it was a minor virus and i cleared it up i didnt want to go through the hassel of opening up the case so i left the pc ram in there but now i get blue screens when using kazaa or winMX this never happened with the pc ram i uninstalled the programsn and re-installed same thing i wonder if it is because the pc is slower by the way i am running win k pent so i am thinking of getting more ram my mBoard handles DDR do you think this may solve the problem could the downgrade from pc to pc cause this blue sreen issue that never happend in the past with kazaa and winmx if im PC100 ,PC133, or DDR? gonna open the case again it will be to add better ram your suggestions would be of great value thank you guys nbsp

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I just pulled 2 sticks from my friend's computer. 1 is pc133 and the other one has no label. He doesnt know what he has.

How can you tell or test if it's pc100 or pc133 ?

A:pc100 or pc133 ?

Put the doubtfull stick in on its own. download EVEREST HOME edition(used to be AIDA and if you have it that will do) and it will tell you the real speed.
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Working with a motherboard with an Intel chipset... older school, the Whitney i810

Checking the specs it takes 100 and 166 SDRAM but not 133... it's the next series of motherboard chipsets that take 133 SDRAM as well

Currently running with 133 SDRAM though, and perfectly fine it seems... is it simply an issue that 133 SDRAM wasn't available at the time the motherboard was initially released?

Should I experience any problems or comeback using 133 SDRAM in the system?

A:PC100/166 RAM... But Not PC133

You probably won't experience any problems at all. The new memory will run at 100 since that is what your mb supports, but it is capable of 133. That's all.

You might look for a BIOS update to see if it addresses the 133 MHz issue. But the subjective difference between 100 and 133 is so small, it hardly warrants the risk of flashing the BIOS, especially on an older machine without all the BIOS safety built in to the new ones.
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A:pc133 ram vs. pc100

I run 700mhz, K7. Get a second on this but I believe you can interchange them with no problems. I would go with the PC133 SDRAM.
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A:Is it PC133 or PC100?

Unfortunately there is no easy way unless you have a memory tester. The next easiest way besides taking the chance of installing it in a computer would be to obtain the data sheet or specs from the manufacturer.
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HI, I have one module of sdram and I was wondering if anyone could tell me if it is pc100 or pc133. The chips have Infineon printed on them as well these numbers and letters hyb39s128800ct-7.5 It is double sided with a total of 16 chips . I don't have a spare computer to install them into and use a progam to detect their properties , I'll have to rely on your help.

Thanks alot!

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I have a friend with a compaq I think like a P-500
I was fixing it for him because he had a blank screen when
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I noticed some of the ram chips were PC100 and a couple were pc300, and a couple I could not tell
I put 128/100 with a 64/100 and it works fine.
But one of the 128/100 chips does not work at all....
Can you mix and match them like that and would it cause a problem?

A:What is the difference in PC100 and PC133 ram?

pc 100 is memory that is rated to run at 100mhz
pc 133 is memory that is rated to run at 133mhz

No idea what pc300 is

some you can mix and match, some you can't, depends on the motherboard and what it supports for memory. The faster memory should just run fine at the slower clock speed but some motherboards won't recognize the faster memory.

I don't suggest mix and matching on amd processor's
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A:combining PC100 with PC133 RAM


I won't expect that to work as the buss speed is to slow for the 133 to sync to.
sorry :blackeye:
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i have a compaq AMD-K6 running around 466MHz. i want to add some RAM but don't know which type to use between PC66, PC100 or PC133.


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A:PC133 in a PC100 MOBO??

Get Memtest86 from
Read the instructions to make a floppy, then run it with different configurations.
Rosewill is a crap brand, return it for something reputable (Kingston/Crucial etc.)
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I have talked to guys who own computer stored and he said that because my computer is older ( about three years) and is already running one sisded PC 100 RAM it will not work with PC 133 RAM. will PC 133 RAM work in my computer as long as it is one sided?

will it make my system crash?

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This discussion indicates that my machine can handle more memory: How can I verify this?


A:Mixing PC100 with PC133 SDRAM for XPS R400 Dell

maybe the bored doenst like pc 133 ram
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So let me start again First post here. I'm a programmer who doesn't meddle with pc parts. Well now has come the time!

I used the tool that Crucial provide on their website, which claims that my pc contains 2 pc133 slots and 1 pc100 slot (sdram).

It says I have max. capacity of 512mb. Will 2 256 pc133 sticks be ok? Or will performance default to pc100?

Also, what're the types of ram and will any other work with my pc? TIA.

A:My pc contains 3 memory slots: 1 SDRAM, PC133; 2 SDRAM, PC100 slots.....
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A:Burned RAM slot inserting stick backwards

It will reduce performance since you can't use the full amount of your RAM but you might not notice it unless you game or use applications that use intensive graphics and how much RAM you have left. You would be better off buying a new board since I agree that the warranty probably won't cover your mistake. However, you could contact the motherboard manufacturer and ask them anyway since you have nothing to lose.
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A:Is RAM backwards compatible?

some people had success with mixing RAM speeds such as DDR266 with DDR333. nonetheless, there are people who were unsuccessful. but most people would say that as long as your motherboard can support it (motherboard can support up to DDR400), it is ok to mix it a DDR266 but it will deafult to the lowest speed of the RAM's installed.
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A:Is 802.11N backwards compatible with 802.11G?

Yes most certainly you will be able too as mostly all routers with wireless N also support wireless G.
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A:SATA II backwards compatible?

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A:are HDD SATA2 not compatible backwards?

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A:PC2100 and PC2700 backwards compatible?

No. You can use the pc2700 in place of the pc2100.
I replaced my pc2100 w/ pc3000 memory and all is fine.
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A:133MHz processor - Backwards compatible to 100MHz?

If I understood correctly, the 1000E is for 100MHz, the 1000B is for 133Mhz, and the 1000EB should work for both 100 & 133.

Not quite. I'll explain what the E and B mean with an example:

P3-600: 100MHz FSB, Katmai core
P3-600E: 100MHz FSB, Coppermine core
P3-600B: 133MHz FSB, Katmai core
P3-600EB: 133MHz FSB, Coppermine core

The E means it has a Coppermine core, the B that it runs at 133MHz FSB. The P3-733 is merely called a P3-733, not a P3-733EB, since there is only one version of it (133MHz FSB, Coppermine) and there is no need to add the E and B to differentiate it from any other version. Same for the 866 and 933. You can run a 133MHz FSB CPU on a 100MHz FSB, but it will run 1/4 slower since the multiplier is locked, i.e. a 600B running on a 100MHz FSB will only run at 450MHz. A P3-1000B running on a 100MHz FSB will therefore be stuck at 750MHz.
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I recently tried to add memory to my home-built pc.
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I removed the 128 stick from DIMM 3 leaving that slot empty and all errors ceased.
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Below are the stats for my pc.

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A:PC133 Memory

98 has issues with > 512mb of RAM. I'm sure someone will come along and explain it in much more detail.
Also it is questionable whether you get much value for money over 256mb, unless you're doing something like processing very large image files in Photoshop or similar, although RAM is pretty cheap nowadays. In other words, you're probably not losing anything by not having that last 128mb installed

Just down the page there's a thread entitled Too Much RAM memory which will tell you a lot

<a href="">Too Much RAM Memory</a>

[Edited by Paul D on 07-01-2001 at 11:07 PM]
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What is the CPU limit with PC133 memory? In other words what is the highest CPU in megahertzs
that a person can use PC133 memory with and get good performance and no problems?

A:PC133 memory limits

Strange question, as the cpu limit is generally a limit of the motherboard rather than the memory. Motherboards that will use pc133 memory don't necessarily all support the highest processor that will use 133 memory.

Almost everything now uses DDR memory
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I expected the extra memory to be automatically found but maybe I need to alter something in the BIOS.

Any advice will be much appreciated.

A:New PC133 Memory not Being Recognized

First make sure that both are the same type ie. unbuffered/ non ecc ....some boards will not let you mix and match.

Then you need to put your new stick in the first slot on the board, and the old one in the second. The fastest stick in my experience always works best in pole position, even though your board will default all memory timings/speeds to the slowest one.

Hope this helps.
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Hi again! What is the CL designation? How do these two differ?

256MB $89.99 (USD) CT32M64S4D75 SDRAM, PC133 • CL=3 • Unbuffered • Non-parity • 133MHz • 3.3V • 32Meg x 64

256MB $89.99 (USD) CT32M64S4D7E SDRAM, PC133 • CL=2 • Unbuffered • Non-parity • 133MHz • 3.3V • 32Meg x 64

I was looking at memory at

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A:Solved: bad memory stick AND slot?

Yes, that could be possible.
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I recently upgraded my processor amp motherboard from AMD Phenom II X Asus M N T-M Now it s AMD FX- amp Asus M A L-M LX I ran two modules of RAM GB GB on that previous motherboard These are my modules Corsair CMZ GX M A C Vengeance GB Single Module DDR Memory Kingston Value RAM GB don t know the exact model but it was a Mhz always 2nd DIMM Solved: on Memory slot on is hardware new reserved motherboard module Both modules have the same latency I just had to downclock the corsair module to Mhz amp then they both ran in dual channel mode Now on this new motherboard when I check sys info in BIOS it shows just GB RAM or GB basically it Solved: Memory on 2nd DIMM slot is always hardware reserved on new motherboard just detects what s in the first slot When Solved: Memory on 2nd DIMM slot is always hardware reserved on new motherboard I boot into Windows it says that GB or GB the other slot is always hardware reserved Also task manager shows wrong RAM speed Instead of Mhz it shows Mhz And when I really run it at Mhz or even below Mhz it s always wrong in task manager There s another interesting thing happening when I try to change the memory speed in BIOS When I change it amp as soon as I hit enter after F system just powers down for a few seconds amp boots right up This is just my second motherboard amp idk if it s normal but it sure doesn t feel right I m posting this after going through a lot of posts on similar topics amp the solutions are not working for me I even checked for bent pins on my CPU but it looks good As it looks either the RAM modules are incompatible on this motherboard but then why is the speed in task manager always wrong or something is wrong with the motherboard This is what I think but I need your help to make it work I m mentally exhausted now nbsp

A:Solved: Memory on 2nd DIMM slot is always hardware reserved on new motherboard
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A:Solved: Is this memory compatible

Go to and click on check my system for a report
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A:Is DDR2 memory backwards compatable?


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A:pci-e 2.0 graphics card compatible to pci-e 3.0 slot

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A:Making an External HDD backwards compatible for Xbox games on an XBox 360

360 isn't backwards compatible with Xbox games. Since you have digital copies of the game, we can't be sure you actually own a legit copy. So, we can't help you sorry.

But, you can use this to format external drive for your 360.
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i ran a mem test to see what i had i ordered the wrong memory i think.. everyone said it would be fine in my computer. Here is my results

and here is the memory i ordered..

says i need pc2 5300 and i ordered 6400.. am i screwed and need to return it or will it work anyways? thanks

A:bought this memory will it work? its backwards compatiable right?

I would remove the memory that is in there right now and check what speed it is, the Compaq website says yours takes PC2-4200

Most memory will clock back, but you never know how the bios will handle this, it is always best to order the correct speed.

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I m guessing you guys get compatibility questions a lot sorry to be a bore I have a P C -E Mobo and I m wanting to get some extra memory Taken from the manual Dual-Channel Memory Architecture x -pin DDR DIMM sockets for up to GB memory Supports PC unbuffered ECC or non-ECC DDR DIMMsClick to expand Am I limited to how many pins there are in the sockets It says x pin sockets and most sticks I see are pins I was thinking of maybe getting these http www ncix com products index php sku amp vpn OCZ P GK amp manufacture OCZ Technology but I m not sure if they re compatible so I appreciate any help I can get and if these don t fit maybe some suggestions for memory that would fit at that price range or better yet exactly what I should read when I see the info of a memory stick and what I m limited by nbsp

A:Solved: Memory - Mobo Compatible?

Found the Kingston compatibility form thanks to the faq so never mind
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Hi Guys,

Acer T180 with 2 X 512Gb PC2-4300 CL4 sticks. CPUZ reports as running at 100.5Mhz?

I want to add more memory.

Can I add 2 matched sticks of PC2-5400 CL4 1GB each
or 2 sticks of DDR2-5300 CL5 1GB each.
Both of the above at 675Mhz.

I have 4 slots each max of 1Gb; 2 used as above, 2 free.

What are the rules and implications for matching memory?
Is it correct that whatever I put in will run at the slowest speed i.e. the original PC2-4300 above?
Does it matter which slot pairs are used for which sticks e.g should the 1GB sticks go in the first two slots rather than the last.

I also see specifications like 5-5-5-15 , does that matter.

Wow, sorry for all the questions!


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A:Is the GeForce GTS250 compatible with a DDR2 board and PCIe slot?

Powersupply? Just making sure...
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I purchased a computer at a garage figure trying out some help pc133 will memory I which work and work wont to need sale a couple of weeks a ago for a couple of bucks the older couple said it was dead but I liked the case and was planning on moving my internet computer into that case it was a micron millenia max gs and the only thing wrong was the video card was dead I put in an old video card cleaned up the windows os and the computer ticks like a new watch according to the micron website the motherboard is a tazer tyran s http support mpccorp com apps specs asp I need some help trying to figure out which pc133 memory will work and wont work ID the total I need some help trying to figure out which pc133 memory will work and wont work pc memory is mb my current internet computer pIII is limited to mb of memory so I m thinking about buying sticks of pc memory for this micron it has sticks of mb for only a total of the micron website and several other memory websites say that this computer will use pc cl- unbuffered non-parity pin volt sdram dimm http www crucial com store MPartspecs Asp mtbpoid A D A CA amp WSMD Millennia MAX GS amp WSPN CT since pc is so expensive new I want to try and find some used memory but comparing all the pc on ebay for instance and trying to figure out which will work is ridiculous my question will most pc cl- unbuffered mb work in this computer what are the important specs what should I look for in the specs so that I get the right memory so it will boot thx nbsp

A:I need some help trying to figure out which pc133 memory will work and wont work

Anything on this page would work actually. And the prices are not too bad.

Buying ram off ebay is not usually a good idea, if you do make sure you have a very liberal return policy wth it. and buy only from a reputable company. Buying from an individual is not a good idea for computer components at ebay.
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I've got a system with one 128mb stick of PC2100. I understand it is 133mhz SDRAM.

I went to my local PC store to buy another stick and he sold me a stick labeled PC133.

He seemed confident that it was the same thing.

Is he right or should I be returning it? Or worse, will it cause any problems if I install it along with the existing memory?

Thanks ...weeG

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When inserting memory module on the memory slot it was not aligned properly. When i turn on the power i noticed smoke and i immediatly turned off the power. Removed memory module and half of it was burnt, now my question is the memory slot damaged? Because its slightly burned in the inside slot, could i install a new memory module in that particular slot? or do i have to change the memory slot thats on the mother board?

A:Memory Slot

You are probably lucky if you didn't kill the whole board. The slot is most likely toast. If you were brave enough to try another stick in the same slot, it may not work, or it may burn-up something else. I don't think changing the slot is really an option. Motherboards are not exactly repairable items.
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other day my computer made loud long Beeps at Post Google listings said dram problem I normally run gb of ram in a - configuration I removed the card from B and then my system started fine with just one card in A wondered if it was just the card its-self so I placed the removed card into slot A still started up fine with just one card original B card installed in A then I placed other card which was originally in slot A into slot B to be memory bad slot B1??? back to - again back to long Beep at Post again as long as i leave B empty then my system starts fine motherboard manual says i have to have a card in A and B for duel channel to work--- right now i only got gb showing on start up page looked at System Device Manager and found a funny thing no yellow markers shown but -----all my Nvidia nForce bad memory slot B1??? Ware slots bad memory slot B1??? show quot no driver installed for this device quot but under the quot driver tab quot each shows the driver name and version listed driver update wizard for each said quot the correct driver software program was installed quot ran quot scan for hardware changes quot --- found nothing here is list ---Direct Memory Access Controller bad memory slot B1??? High Precision Event Timer nForce Memory Controller listed twice Numeric data Processor Nvidia nForce PCI System Management PCI Standard RAM Controller listed times Programmable Interrupt Controller System Timer all with no driver installed but driver name and version listed under driver tab did go to Nvidia and run their motherboard driver tool downloaded recommend program and after install and reboot no changes is my B ram slot problem a side effect of hinky windows os over time or is it just my motherboard dying of old age power supply old age should i do a complete clean reinstall of Vista ran Repair from my OEM disk which says no repairs needed build data---- P N-D ASUS motherboard GB Western Digital blue SATA HD No-Raid Intel socket Core Duo CPU Nvidia DDR GT GPU OCZ DDR mhz RAM running at GB at present time OCZ watt Power Supply Vista OS i built system in with no major problems until now replaced DVD drive and Viewsonic monitor---both quit working over last few years sorry about the edit have new DVD drive and monitor for awhile nbsp

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A:Memory slot smoking

Please place your system specs, that way we could help you easier.:
System Info - See Your System Specs

The beeping noise, is it a one long beep? Or is it accompanied by another long or short beep?
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actually, i was used to a pc with 160mb-ram - which is 32 + 128. now i own a faster one with one single 512mb-slot. but unfortunately, some problems occur: gta3 is collapsing all the time, i cannot copy a normal 1024x768 .tga-image to clipboard via corel (»low memory«) and after watching some freshly downloaded quake3-bots i got the message »low memory«, too. sometimes, even some multitasking surfing can bring me up to fully busy memory - is this a technical problem or am i asking for too much power!? i heard something like this memory-damage would lead to the problems i have.
speaking against it is a rather stable quake3 while in game and a fascinating stable 1nsane played also in 1280x1024 - without any stinky problem.

thanks and regards,

A:¿maybe my memory-slot damaged?

The memory module might be faulty or motherboard might not support 512M modules
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HEY GUYS GREETINGS i just joined earlier today im seriously in need of help my friend ask me to fix his pc i tried to replace the memory with mb ddr with his original memory mb and a mb of ram just then when replacing it and turning it on i heard a huge quot beep quot then i immediately shut the pc down then when i check it up i saw i slot, help Fried memory quot black spot quot on one Fried memory slot, help of the memory slot i figured it out its fried up luckily the mobo has two memory slot only one of the slot had been fried i replaced the two mb with the original ones the problems now is that the pc is kinda slow in starting up showing the bios and showing a quot blue error screen quot after and sometimes restarting over and over again i really need your help guys really really need it im counting on this site for any help you can give thanks raj philippines nbsp

A:Fried memory slot, help

You not only fried the memory slot, you have damaged the motherboard
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I just purchased my computer yesterday. I removed my Sony Memory Stick PRO Duo from my digital camera and was going to download them to my computer. The slot came with a Dell piece. My memory stick is too small. It did not come with an adapter and I have no idea how to get it installed. Any ideas???

A:need help with memory stick slot

It is likely that the two aren't compatible.

What model Dell do you have? The type of adapter that you need depends on what slots your Dell has.

Also - most cameras come with a USB cable. Could you use that instead?
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I have been building computers for years and never found a reason for the placement of the memory slots on a motherboard. If you look at a board that uses an Intel CPU, the slots used are1-3 and/or 2-4. If you look at a board that uses an AMD CPU however, the slots used are 1-2 and/or 3-4. Does anybody know why this is? No, I'm not trying to make a better motherboard, I'm just curious enough to finally ask.

Thanks for any info anyone can give.

A:Memory slot placement

'If you look at a board that uses an AMD CPU however, the slots used are 1-2 and/or 3-4.'

refer to the MSI K9N - which see;

Dual channel with slots 1/3 or 2/4.

Assuming that you installed 2 Gb in 4 modules of dual channel ram and it is used from byte 0 to 2047 linearly, then assuming that the average 2 Gb ram install running XP uses about 50% of the Ram running avg8 (as example), you would get heating in ram modules 1 and 3 and none to speak of in 2 and 4.

Thus, heat separated components and better cooling.

My opinion.
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I have a dell dimension 9200 and the motherboard can handle a maximum of 4gb of ram, but is there a limit per slot?

In other words does it have to be 4 x 1gb sticks of ram or can I use 2 x 2gb sticks?

The reason I ask is that I've had lots of bsod and crashes recently and after performing lots of tests using memtest it seems that 2 of the ram slots on my motherboard are bad meaning I only have 2 good ones to use.


A:Maximum memory per slot?

RAM Memory Upgrade: Dell, Mac, Apple, HP, Compaq. USB drives, flash cards, SSD at will provide that answer for you.

According to crucial

Each memory slot can hold DDR2 PC2-5300, DDR2 PC2-6400 with a maximum of 1GB per slot.
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My Hp Pavilion g tx did not pose any problems for years But a week ago I upgraded my RAM from to gb The shopkeeper inserted hynix gb nbsp ddr ram So Can Other... one I ram 8gb 4g in to my slot. upgrade memory ram that makes two rams in my loptop nbsp - Samsung Came when I purchased laptop years ago - gb ddr Hynix b ddr nbsp After a week my laptop stoped working Showing it two service center they said one of my nbsp memory slot is damaged and can't be used nbsp So now I had only one memory slot active with gb ram inside it My Question nbsp is - CAN I INSERT GB RAM IN ONE MEMORY SLOT SINCE OTHER ONE IS DAMAGED nbsp OF MY PAVILION G TX MOTHERBOARD nbsp If yes then please tell me - Of what type of ram should I be looking for Sepecification From where should I buy Crucial got gb ram which I can't usePlease reply ASAP nbsp Thanks amp RegardsPrince Soni
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it seems that the memory stick slot doesnt work anymore. in the device manager there is a yellow question mark and it says that it it not working. i would try installing the drivers but i kinda lost the recovery cd or what not. well before when i bought this, VAIO PCV-RX580, it was using Windows XP Home and now i use Professional. not sure if that makes a difference. im just wondering is there anyway i can get the memory stick slot to work again?

A:MEMORY Stick SLot???

Try updating the drivers from here, search for your memory device.
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I have a Tecra Laptop running Windows XP Professional The latptop has two slots A amp B in which you can add MB of memory each When starting Problem Slot Memory up the PC with both modules installed I get the error message quot Windows could not start because the following file is missing or corrupt system drivers pci sys You can attempt to repair this file by starting windows setup using the original setup CD-ROM Select R at the first screen to repair quot I have done as indicated and done a full repair on Windows XP but still get same message I then went to Microsoft Memory Slot Problem com to search the knowledge base According to Microsoft the above message indicates quot This issue may occur if your computer contains a hardware component that is either damaged or is incompatible with Windows XP quot I followed their instructions and it turns out that if I put just MB in memory Slot A the Memory Slot Problem computer starts up fine If I add it in MB in slot B I get the above problem At first I Memory Slot Problem thought it was a bad memory module but if I switch them they will both start up the computer in Slot A when used by themselves So it appears to me that Slot B is the problem somehow Any thoughts or assistance greatly appreciated nbsp

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A:memory card slot

Put a card in it and:

Look in Control Panel - System - Hardware - Device manager

Expand the "Universal Serial Bus controllers" and see if a USB mass storage device is listed.

Also look to see no yellow ? or ! are shown, indicating missing drivers.
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I was told by Lenovo that one slot will accomodate 1 gig of memory, instead of using 2 half gig sticks. I was also told about something called "memory boost" as an external memory source to increase memory. has anyone heard of this? I want to run PhotoshopCS and need 1 GIG of memory and don't want to get new motherboard(the machine is long out of warantee). can anyone help on this issue?
thanks, JeffB

A:Bad Memory Slot in IBM T30 Laptop

"readyboost" is a feature only available for Vista, where it can use a USB memory stick as an alternative to paging back to the hard drive, it's not really in place of RAM.
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A:Can't find my memory slot !!!

look at the manual or call the manufacturer.
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So recently my colleague tried to upgrade the RAM in his laptop, but he ended up messing up really bad he actually broke the only memory slot on the motherboard (yikes!). He asked me to take a look at it for him, and I was pretty surprised how badly he had messed it up (as in there's no way it could be fixed). I told him he might have to replace the entire motherboard, but he really can't afford that right now. I let him know that might be his only option, but I decided to ask here before giving up. The rest of the motherboard is fine; only the memory slot is broken. So is it possible to replace just the memory slot without replacing the entire motherboard? And if so, can anyone help me out with doing this? He does really need his laptop, so any help would be awesome.

A:Broken memory slot

How long can he go without a laptop?
That is a big project. You will need to be a master with a solder gun. Just getting the old part off without melting the motherboard will be an adventure. There are a LOT of pins.

First you will need to find the Brand and model # of the motherboard. You can use CPU-Z for that - it will list the info on the third tab.

Then, armed with that info you will search for the RAM SOCKET replacement. This is where it will get interesting, as the available sources will be in Asia. Shipping will kill you (for a $3 part). And you will probably need some translation skills too.

Your colleague really couldn't afford to mess his RAM Socket up. Now his best bet is to buy a new laptop.
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My motherboard just went out on my pc and I was wondering if there is something that I can hook up to my laptop that will let me read whats on my pc memory, kind of a external memory slot or something. I've been searching google for a few hours and I can't find anything and I know you guys always know what your talking about and answer very quickly. Any help would be appreciated.

A:External Pc Memory Slot

Your actual data is not stored in the memory, its stored on the hard drive. And it's very easy to connect a hard drive to any other PC, there are many adapters for this.

Here's a version that simply connects a drive, either SATA or PATA(IDE) to a USB port without any enclosure:

Here's a version that basically converts the drive into an external drive that you can safely use that way:
This one only supports SATA hard drive with a connector like this:,r:0,s:28,i:160&tx=102&ty=76

More enclosures to choose from:
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Hi,my name is fajar from indonesiai want to add new memory to my laptop HP 1000-1b09auin CPU-Z, my laptop have 2 memory slot,but, i can't find other memory slot where is the other slot ?  Thanks for help  Best Regards,

A:I Can't Find Other Memory Slot

Hi: If you look at the illustration in chapter 4, page 52 of the service manual, it appears that the memory slots are stacked on top of each other.
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A:550-126 where is memory card slot

Hi, Very interesting. The following link shows its specs: It has 7-in-1 multimedia card readerFigure : View of memory card readerSupports the following cards:Secure Digital? (SD)Secure Digital High Capacity (SDHC)SDXCMemory StickMemory Stick SelectMemory Stick PROMemory Stick MagicGateWith Front I/O portsUSB 3.0: 2Headphone: 1Microphone: 1and Back I/O portsFigure : Odense back I/O panelUSB 2.0: 2LAN (Ethernet)HDMI: 2USB 3.0: 2Audio: Line inAudio: Line outAudio: MicrophoneI believe it is at the front but where. What is your card ? Is it on the list above ? Regards.
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I was thinking about upgrading from my 512 ddr pc2100 64M X 64 to 4 times 512 pc3200 64M X 64. My mobo says it supports pc2100 64M X 64 and I here most of them are backwards compatible and should work right? I would take the pc 2100 out and put in the 4 slots of 512 pc 3200 to make 2 gig as my mobo supports up to 4 slots/4gigs. Is there a point where more memory doesn't really make a difference when it's already fast as heck? I guess that depends, but for like regular windows applications or the today's new games? -Thanx

A:Upgrading Memory "Backwards Compatibility"

Need more info

What kind of MoBo?
Version of bios?
etc. :hotbounce
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A:I can't find the memory slot to Satellite S70-B-10V

Memory slots on this notebook model are placed under the bottom cover so when RAM modules must be exchanged or upgraded bottom cover must be removed.
Please note: on some notebook models RAM upgrade is supported by notebook owners and RAM upgrade steps are described in user?s manuals document.

I your case such upgrade is not supported and RAM upgrade should be done by authorized service provider.
Generally speaking bottom cover removal is not complicated but you should not do it alone. This will cancel valid warranty.

In my opinion, before you do anything contact nearest Toshiba service provider in your country and ask for help. Simply pick up some info about price and compatible RAM modules.
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A:hp 15-g005ax maximum memory and slot

Hi, It has: 1 customer-accessible/upgradable memory module slotSupports single-channel memoryDDR3L-1600-MHz Single Channel SupportDDR3L-1333-MHz Single Channel Support (DDR3-1600 downgrade to DDR3-1333)Supports up to 8 GB of system RAM in the following configurations:? 8192-MB total system memory (8192×1) or (4096×2)? 6144-MB total system memory (4096×1) + (2048×1)? 4096-MB total system memory (4096×1) or (2048×2)? 2048-MB total system memory (2048×1) Source: 3rd manual on the following link, page 2 and the answers: (a) Yes (b) only one. Page 65 of the manual shows you part number and how to install RAM Regards.
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Alrighty I m running an MSI K N Neo I ve had it for a while help. coded memory slot Color so far I ve just been running a stick in Color coded memory slot help. the first green slot Someone got me two sticks of to fill out my system I installed them but only recognized g of ram I checked the manufacturer s site to find http www msicomputer com product p spec asp model k n neo platinum a nice diagram about dual and single channel memory that makes no sense to me I believe all the sticks are dual channel they have memory modules on both sides of the ram if that is how you tell I m not sure All three sticks are kingston value ram they are pc all three work as I discovered after some musical chairs with memory I m currently running the two new sticks recognizing g of memory while I have my original stick in a box Can anyone help me out with the diagram or point me in the direction of something more helpful The manufacturer s website has an online tech support page that is under construction I just downloaded the manual but I was hoping for some easy insight Anything would be greatly appreciated at this point Thanks nbsp

A:Color coded memory slot help.

Did you scroll down to the "DIMM Module Combination" and "MSI Reminds You..." and read what is posted there?
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A:How do I use the memory card slot on my laptop ??

Hi, I have a new G72-25OUS laptop, I'm wondering how to use the slot on the left side, that says SD-MS/Pro-MMC-XD? I assume its to put a SD card in from my camera to upload photos, do I just stick it in and if so, how do I get it out? I don't have a manual, didn't come with one and can't find info in the help section. Hope someone knows how to do this. Thanks.
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Go to Solution.

A:XC-704 Expansion Slot & Memory Upgrade

Ok, Sorry looking up the model at Kingston and a couple other sites didn't show your computer and seeing I hadn't seen any I was confused. Based on what I have found maybe a Model from other country.  With that said it looks like it comes with 2gig DDR3L Ram and is Upgradable to 8Gig Also looks like yours comes With 1 PCI Express x16 Slot. I am not sure with the PSU and with that slot if you would be able to upgrade to a different Graphics Card. GPU and size of case would put a huge limit on what could be able to fit...  James
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I removed my memory card before ejecting it. Now my memory card slot doesn't work at all. I have done it before and got help on fixing but I can't remember how I did it. It is a readable card and I have tried several different ones so it's not a issue with card itself. The computer doesn't even see I am putting it in. Please help I do a lot of photo's and it's annoying to have find the computer plug everytime I need to get the pictures off.
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i have a N1996 motherboard with two slots for 184pin memory. i have purchased a new module to slot into the second slot but i just get a long beep then the beep stops, then a long beep again etc.
i have just tried the original one in the second slot(on its own) twice, but still the beep. i have put the memory back into the first slot and it works fine.

any help would be grateful

would i need to change the bios setting, or do you think that the second memory bank is down.

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I recently added G of Hynix memory HYMP F CP N -Y to 8 free with GB acpi 24 compatible bios: find after sees server memory 32G, 16G adding sees I dmidecode missing memory, a Dell t workstation after adding 16G compatible memory, I find 8 GB missing server memory with acpi bios: dmidecode sees 32G, free sees 24 that contained Gof memory as originally shipped M T AZ -CE dmidecode -t grep Size grep MB Size MB Size MB Size MB Size MB Size MB Size MB Size MB Size MBAlso the Dell mboard ACPI bios sees all G Memtest passes after adding 16G compatible memory, I find 8 GB missing server memory with acpi bios: dmidecode sees 32G, free sees 24 on all memory modules of mbeach So reordering or reseating the memory modules won t solve this Itried this already I m using the last bios posted to Dell s support pages gt dmidecode -s bios-versionA gt dmidecode -s bios-release-date After I boot into linux the system sees only G dmesg e BIOS-provided physical RAM map BIOS-e mem x - x c ff usable BIOS-e mem x f - x fffff reserved BIOS-e mem x - x cfe abff usable BIOS-e mem x cfe ac - x cfe cbff ACPI NVS BIOS-e mem x cfe cc - x cfe ebff ACPI data BIOS-e mem x cfe ec - x cfffffff reserved BIOS-e mem x e - x efffffff reserved BIOS-e mem x fe - x feffffff reserved BIOS-e mem x ffb - x ffffffff reserved BIOS-e mem x - x fffffff usable which is only bytes gt free -m total used free shared buffers cachedMem gt grep line sys devices system memory state - gt all onlineBut memory - are not detected total lines Why x M - gt Gonly But x M - gt M not enough to account for the missing ram Arememory - reserved gt dmesg grep eserved BIOS-e mem x f - x fffff reserved BIOS-e mem x cfe ec - x cfffffff reserved BIOS-e mem x e - x efffffff reserved BIOS-e mem x fe - x feffffff reserved BIOS-e mem x ffb - x ffffffff reserved e update mem x - x fff usable gt reserved e update mem xcff - xffffffff usable gt reserved DMA zone pages reserved Memory K K available K kernel code Krwdata K rodata K init K bss K reserved Kcma-reserved Looks like the reserved memory is not nearly enough to account for thediscrepancy MTRR gt dmesg grep MTRR MTRR default type uncachable MTRR fixed ranges enabled MTRR variable ranges enabled dmesg gives no warnings This machine also runs an ancient copy of Windows Vista Business Thatproduces the same pattern the Dell nbsp bios sees all G but the OS only Adding the boot parameter mem G has no effect because by the point thatthe boot process loads the kernel the visible memory is already reduced So apparently something happened when the bios created the physical ram map Which causes the loss of G

A:after adding 16G compatible memory, I find 8 GB missing server memory with acpi bios: dmidecode sees 32G, free sees 24

The maximum RAM compatibility for Windows Vista Business is only 4GB. a different OS will utilize the remainder.
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I m sorry this is so long but please take the time to read it all because I have already taken a LOT of steps to solve this myself I am an IT Professional and have been Memory locks Stick up unless in is Vaio slot since the s The computer I m having the problem with is mine it has always had up-to-date AV and has Automatic Updates on I check it every so often with SpyBotS amp d or MalwareBytes and it has NEVER had anything besides tracking cookies It has been on a secured wireless network out in the middle of nowhere doubt anyone would hack it with both a hardware firewall at the DSL entry point and Windows Firewall on It has never had a Memory Stick in its slot before now The only removable media I ve ever used with it is a big USB disk for backups which unfortunately has not been done Vaio locks up unless Memory Stick is in slot in about months Vaio locks up unless Memory Stick is in slot I ve never had Limewire or any other risky stuff installed on this computer I don t use FaceBook or any of the social networking I don t surf any type of risky sites Vaio locks up unless Memory Stick is in slot and I don t download anything onto this computer Its the safest computer on the planet The computer is a Sony Vaio K-series laptop probably - years old running XP Home SP and IE Here s the sequence of events as best I recall them - everything is fine I m looking up something boring like outboard motor parts Its supposed to storm tomorrow so I am going to unplug it Automatic Updates are downloaded and ready to install so I choose quot Install Updates and Shutdown quot It does its thing in a normal amount of time no indication of problems and shuts down I unplug the charger and put it away - I get the computer out plug it up push the power button It gets to the WinXP logo with the progress bar underneath The bar rotates around a couple times then sticks I wait probably minutes and nothing ever happens I notice the orange light is on beside the quot Memory Stick quot slot I boot it up in Safe Mode That works I check the logs for the Windows Updates everything appears to have went fine Check Event Viewer for some clue as to what happened nothing Check Device Manager no splats Everything looks fine Hmmm maybe a fluke try a normal reboot again Exact same result hangs at same place with orange light on beside quot Memory Stick quot slot So I boot into Safe Mode and uninstall all of the Windows Updates that have the date on them I made sure I did them in the correct order so all dependencies were resolved Tried another normal boot Nope hangs at same place with orange light on beside quot Memory Stick quot slot OK now I m scared So I go to my other PC the desktop and do some Googling of the symptoms I find one in particular a malware-infested Sony VAIO locking up with Memory Stick light on So its probably malware Since I already have the latest version of Norton AV I run a full scan on the Vaio with that Comes up clean Then MalwareBytes latest version comes up clean Then I reboot into Safe mode with Networking Then run Housecall online with Trend Micro comes up clean Just for S s amp G s I even try their New Beta scan clean Then Kaspersky s online scanner also comes up clean Then BitDefender again clean Then as a last resort I disable NOrton s real-time protection and run Combofix Combofix did not find anything I looked through its logs but have to admit I m not that good at fixing something manually I don t know how to interpret Hijack This logs I always give up before then and reformat But I have a bunch of old software that I don t know the registration keys for so I do not want to reformat At this point I kinda panicked and tried Restoring Windows to a Restore Point on That hosed my IE Windows was unable to restore back to the Restore Point that Combofix had just created - So I dinked around with it reinstalling IE and Java Finally got that working again I had read in the post about the malware-laden Vaio that his booted normally if he pu... Read more

A:Vaio locks up unless Memory Stick is in slot

Hello SunBoss

I am happy to report that I have solved the identical problem you describe involving system hang on the Windows XP splash screen and the yellow memory stick light turning on at that point. Similar to your experience I could boot in safe mode but no way to get into a normal boot. As this was a client machine on a limited budget I could not waste a lot of time and contacted the client and got authorization to do a full system restore figuring it would eliminate any software issues (conclusion based on ability to boot in safe mode it seemed reasonable?). Much to my surprise after a full factory restore from the OEM restore DVD the symptom was still there, in fact the restore could not complete because it required a full normal boot to finish the restore. So now I was really perplexed, no way it was software (given that the drive had been fully erased and reformatted), so that only leaves hardware and the memory stick module seemed the likely culprit and on a hunch I tore the bloody thing apart (keyboard, rear hinge cover, and all screws from bottom of the case) which allowed be just enough clearance to get inside and remove the ribbon cable from the memory stick module and presto the problem is resolved and unit now boots normally and I am in the process of bringing the system back up to current standards with all the updates, etc, and have already done multiple reboots with no problems. So I suspect you will find similar results once you go through the difficult task of tearing it apart as our symptoms were identical.

Trust me it has nothing to do with virus or malware activity, it is an actual hardware failure!!

Good Luck
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I have installed the new windows 10 in my PC, before this i had windows 7 home premium. i have a memory card adapter in which i used to slid my micro SD card and was able to access it when i had windows 7, but when i upgraded to windows 10 and inserted the memory card reader in the slot it stopped detecting, their is no action and i am not able to access it.
Please help
System: Dell Studio 1558 2010-11 Model.

A:SD memory card/ Slot not working in Windows 10

Hi Anandani,
Dell Studio 1558 has not been tested by Dell for Windows 10 operating system you will not find drivers for it. However, please use the card reader Windows 7 driver and install it in compatibility mode.
Please let me know if this works.
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A:PC Resets - weird memory slot issue

Assuming the RAM is correct for your PC go into BIOS and set DRAM or RAM or whatever your RAM is listed under to Auto, reboot and see if that helps. ALso, make sure that you have the RAM in the correct slots for DDR (probably the two blue as you stated).
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My printer's memory card slot isn't recognized by my computer. I am running Vista. Can anyone help with this. I contacted the printer's tech support and they tried but said it was a Microsoft problem.

A:Memory card slot not recognized on printer

Welcome sannallett,
Sounds like a tech support answer. What is the Brand and Model of the printer?
In Device Manager under your Printer is there a notification sign?
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Hi, can anyone tell me how to access the second slot in my e-system 1511. I was told it was under the keyboard. I can unclip the clips but there seems to be something else holiding it down. I ve looked at the back and can see no screw with kb next to it to indicate that, that is the screw for the keypad.
Appreciate any advice. I have upgraded the first memory. I ordered 2gb and this came in two of 1gb so I am assuming there is a second slot.

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sorry i like to seek your adivce on the following matter

i am using asus P7H55-M motherboard..i was actually using kingston 2x 2GB 1333MHz ram..recently i added 1 nex kingston 1x4GB 1333MHz was working fine until today when the com could not boot up..when i check, i found burnt mark on the 4GB ram and the memory slot..

my question are:
1) could i replace my motherboard if it is still under warrenty
2) could the burnt mark cause by the mismatching of the ram..

A:Burned memory slot on Asus P7H55-M

7ryota said:

1) could i replace my motherboard if it is still under warrentyClick to expand...

I guess so, have you ever tried to establish the communication with the motherboard maker yet? Many of them has it own support lines that can provides the RMA informations.

7ryota said:

2) could the burnt mark cause by the mismatching of the ram..Click to expand...

How? Did you actually force it to be seated in backward position? Look closely at the notch of RAM, they can only go one way, and you can feel the pressure of installing the ram if it goes in wrong way.
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I am using a HP Z400 Workstation Xeon Quad-Core W3565 3.2GHz, 12GB (3x4GB), 1TB, DVDRW, Windows 7 Pro.This the the model with 6 memory slots, so there was a possiblity for 24GB of RAM.  When I populate the remaining slots 4, 5 & 6 with 4GB DIMM, I get errors on boot up for the newly populated slots.  I am unable to configure for 24GB.I did discovered that the DDR3's that I am using are non-ECC.  The system has been running fine with the (3x4GB) setup.  Is the non-ECC preventing the 24GB configuration from working?Thanks for any help you can offer. 

A:z400 - 6 slot memory configut=ration

Yes it is. It is not possible to install standard PC and server memory, I've never seen a system of any brand which supports such a configuration. Officially, the Z400 supports only ECC unbuffered memory modules.However, it will also run with standard DDR3 RAMs, unsupported only means that HP Customer Service won't help you.There are some reports that even 8 GB Modules work, but that's another story, 24 GB runs fine. Mixing different types of memory is generally a bad idea.Use either ECC unbuffered (which is recommended) or non-ECC, preferably six identical modules.DDR3 are relatively cheap, even those with error checking and correction. Good luck
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I just recently purchased a 1gb stick of Kingston ddr400 Ram for my pc.

Currently i have 2 x 512mb sticks in my 1st and 3rd slot of my MB. I currently use the Asus A7N8X-D Board. 3 Memory slots total. What would you suggest me to do for the order of my memory or does it even matter ?

Slot 1 : 512mb
Slot 2 : Empty
Slot 3 : 512mb

Eventually going to be 3gb Memory but Im not the best in these types of configurations.

Thanks ahead of time guys.

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Hi nbsp I recently bought a notebook from HP the HP G with A - processor Inside there was a GB DDR L- Kingston memory module slot with HP u... speed G2 - 355 only Memory on 1600MHz K7H44ES shipped and there are two slots available nbsp I checked with CPU-Z and other tools and it showed a DRAM Frequency of MHz nbsp I added a GB DDR HP 355 G2 K7H44ES - Memory speed 1600MHz only with on slot u... L- Cruical memory module to the second slot and checked again with CPU-Z The DRAM Frequency was just MHz the memory size of GB was recognized correctly nbsp I thought it must be because of two different modules got for testing two other identical GB DDR L- Kingston memory modules and DRAM Frequency was again just MHz nbsp And if only one slot is used with any DDR L- I had available DRAM Frequency was MHz But whenever both slots are used it dropped to MHz nbsp What's wrong Do I need some specific memory modules for this notebook respectively CPU and memory controller nbsp HP Support suggested just that but I believe it's not because of this Perhaps the memory controller is working that way that it drops down to MHz if both slots are used But why should that be With none of my previous notebooks or pc this happened always the memory speed as specified nbsp And Google says that A - has a single-channel memory contoller for DDR L- which would be even faster but instead it runs with nbsp I currently use Windows Pro -bit if this of matter nbsp Cheers