Windows Support Forum

DDR2 1066 RAM running at DDR2 800, need help.

Q: DDR2 1066 RAM running at DDR2 800, need help.

I just purchased 4GB G.Skill DDR2 1066 MHZ RAM and installed it into my motherboard (Gigabyte GA-MA78GM-S2H). I have tried fixing the problem by readjusting the vdimm voltage to 2.1 volts after reading on the G.Skill website that 2.1v is compatible with most motherboards. After doing so, I tried to change the settings in my BIOS to manual so i could reconfigure the RAM to a 1066 mhz option but the max still only shows as 800. Please help me out if you know any way i can change the frequency to the 1066 mhz my ram is actually supposed to be .

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Preferred Solution: DDR2 1066 RAM running at DDR2 800, need help.

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I have an ECS A780GM-A board with an AM3 Phenom II X4 810 CPU and 4x 2GB Kingston DDR2 1066 RAM. A 512 MB Ati HD 4350 Video card. I am running Windows 7 Ultimate x64.

My RAM is displaying as 800 not 1066. Is there anything I can do to correct this or is my hardware not good enough? Cheers.

A:DDR2 1066 running at 800

I didn't bother looking up your hardware but yes check your motherboard manual or manufactures website to make sure the system supports 1066 RAM. If it does then check your timing settings in the BIOS to be sure they are current. Pay close attention to the voltage of the RAM, often "lower priced value RAM" will simply be lower speed RAM that has been over clocked and requires a higher voltage then is typical for non-over clocked RAM.
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I'm looking to upgrade replace my current 2x2GB DDR2-667 modules with 2x2GB DDR2-1066 modules in a couple days but I'm wondering if I really need that!

I mainly write software and run linux on virtualbox on that particular machine and so far everything works really well but I'm looking forward to game a little on it as well, after a video card upgrade of course!

So, would I get like a reasonable performance increase with those ddr2-1066 modules or should I just forget about them and keep my current setup?

A:DDR2-667 to DDR2-1066 performance?

Does your motherboard support the DDR2-1066?
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I just realized I have some extra ram laying around. Here is the question. I was wondering if [email protected] with my AMD 9950 Black Edition OC'ed to 3ghz would be better than [email protected] with my CPU stock at 2.6ghz. I play things like WoW and Battlefield: Bad Company 2. Mostly new stuff.

A:4gb DDR2 1066 or 8gb DDR2 800

Definitely better off with just 4Gb, and having your CPU OCed than to have 8Gb, and running stock.

The difference probably is minimal anyway.

This is a different scenario if you do alot of photoshopping or RAM intensive stuff, those games won't take up gobs of RAM.
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Hi all

I am building my new computer soon and i am juggling between going with 4GB of DDR2-1066 ram or DDR2-800.

My question is this. Is DDR2-1066 worth paying extra for? How much of a performance gain is there?

Either way, i will be going with 4GB of Corsair XMS2 memory.

Thanks, Nissanman

A:DDR2-800 vs DDR2-1066

Actually selecting between 800 and 1066 RAM in the same brand doesn't present to terrible price penalty.

For 5 bucks more I'd go with the DDR2 1066. That's whether I could tell the difference or not.

Truth is, DDR2 10666 generally runs @ 2.0 volts or better, if you set the BIOS @ 1.8 (the generic DDR2 voltage), it's liable to default to 800Mhz anyway.
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Hi, i've just upgraded my mobo and want to upgrade my 4x1gb ddr2-667 to a 4GB (2x2GB) DDR2-1066 setup. I however can't find such a kit anywhere or even any 2gb 1066 sticks on the usual distributers. Does any one know where i'd be able to get some of these (in UK)? Cheers.

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Can anyone tell me why some asus boards that say there ddr2 1066 /are on the list that will run the new faster 1100+ or even 1300+ ddr2 and some like mine asus M3N72-D are not on the list. i have an amd phenom II 920 CPU. Can anyone tell me if i can maybe run these faster models? the specs on my board look the same as others that are listed. and i really want to upgrade to the faster ones without having to upgrade my board also.

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I am looking at a new system for general word processing, internet, and accessing databases on a network. I am under the impression that DDR3 is better and faster (1066 MHz). However, when pricing systems am I better to go with the 4 GB DDR2 or 2 GB DDR3? Less memory, newer technology, and faster clock speed. The system will only need to last 3 years before another upgrade.

Am I better off going with the 4 GB of the the older RAM or 2 GB of the newer DDR3?

A:4 GB DDR2 800 MHz or 2 GB DDR3 1066 MHz?

Hey Mose,
you will not notice a performance difference between DDR2 and DDR3 for the purposes you stated, so 4 gb of the DDR2 make sense. and if you are going to upgrade in three years then you will undoubtedly be building or buying a new system anyway, so the DDR3 you would purchase now would have no place in an upgrade three years from now anyway.
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So, this is my problem, I set it in the BIOS to utilize this RAM at 1066 at 7-7-7-20/2.0V according the Corsair's specs, but when I run Memtest I get tens of thousands of errors within a few minutes. Memtest on the other hand is picking it up at 7-5-4-8-32 also, the things I'm setting are the CL-tRCD-tRP-tRAS, I believe those are the right things to set.

Any Idea's here guys?

A:Getting my Corsair XMS2 to DDR2-1066

If Memtest is picking up errors, one or both RAM modules would seem to be defective. If they are a matched set, you probably should RMA them both.

By the way, in trying to do some research on your Biostar motherboard, I discovered your CPU was not supported by your motherboard even though it evidently works. I don't know if this is in any way related to your problem. See this CPU support list: Biostar.
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Hi Everyone Thought I would post here as I have the same problem I finally went out and upgraded my PC with the following parts P5KC DDR2-1066 Issues Intel E FSB Asus P KC Intel P FSB DDR DDR Kingstone HyperX KHX D K G x GB DDR- All the rest was all ok Power DVD HD etc So the issue I have is that when booting up the bios tells me that it is running in DDR- modus even though I have DDR - RAM P5KC DDR2-1066 Issues Reading the motherboard manual P5KC DDR2-1066 Issues it states that if the RAM is not one of the ones listed you may need to change this setting manually to DDR - This I tried but the PC becomes unstable and receive errors of which one says overclocking failed press F to change to default The other error I get is on bootup I see at the end of the bios information I get a fresh screen with my DVD in bright green with the words press any key to continue if I do P5KC DDR2-1066 Issues it seems to lock the system if I do not after a few sec it starts window ok The DVD is the only part which is still using the old IDE slot and I might add a old IDE cable as I needed a longer one than on the old board so I had an older long IDE cable spare which I used After Windows boots up it runs fine I have installed windows games and software with not issues Any ideas on both issues Thanks nbsp

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Right now I have 2 sticks of Kingston 1 GB 800 MHz RAM and was wondering if I'd acheive any performace gain if I add 2 GB of 1066 MHz RAM. Would I be better off if I take out the 800 MHz ones?

Mobo: Asus P5K Deluxe Wifi/AP

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Will the DDR2 1066 RAM work in a Mobo designed with DDR2 800 standard? I just didn't know whether 240-pin ram units are compatable across varying speeds. Any help would be appreciated.

A:Question about DDR2 1066 RAM Compatibility

There's no guarantee. Have you checked the manufacturer's website to see if they have a compatibility list of systems they've tested the memory in?
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A:Optiplex 755 DT and 745 DT 8GB PC2-8500 DDR2 1066 Mhz RAM

So what is the question or issue?  Posting a question and tags is not how we do it on this forum.
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Hi, I just purchased an AMD 6400+ processor with a Gigabyte board that is Phenom capable as well as 1066 capable(Phenom required ) I have 2 gigs of DDR2 800 and 2 Gig DDR2 1066. My question is... can I run the 1066? will it show up at 800? or will it not work at all? I was originally putting in a 9850 Phenom and opted for the (cheaper) 6400+ but had already ordered the 1066 memory.Would I be able to run all 4 gigs? in XP Pro SP2? Thanks i advance.

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In the next 6 months I am going to rebuild my systerm. I just use it for lite gaming. video watching, net surffing, and communication with family and friends,

I want to spend <$700.00' I would like this to last me 2-3 years.I will not be overclocking.

Since I watch more tv and video than games, I would like to get an AMD motherboard with built invideo, with the option to expand if needed

I plan getting a AMD Phenom CPU.

Trying to find the sweet spot in memory seems to be alittle tricker. I would like ot go with 8MgB of ran either DDR2 800, 1066, or should I wait and see what the new DDR3 has to offer.

I am currently running a DFI Sockett 939 motherboard It doesn't seem to have
any serious problems, but I think that I could make it faster and more stable

I would appreciate any coments or suggestions.

Thank you

A:Ddr2 800 vs ddr 1066 or ddr3 ram for new build

for what u are talking about 2 gig of DDR2 800 would be fine. the DDR3 is way to expensive to use right now, but who knows how long it will take it to get affordable, with the way computer parts are being priced right now, it may be cheap in 2 months, or may go through the roof.
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I don't think this is a Win issue and ask the mods to delete if not applicable But if somebody can help I appreciate I posted this at the OCZ forum days ago and no answer I think I am spoiled used to the good performance of the SF members Some time ago I installed OCZ Platinum GB x GB -Pin DDR SDRAM DDR OCZ P GK in my system Theoretically it should run at MHz but it only runs at MHz Motherboard Asus M A plus manual says it supports DDR with AM AM sockets I have a AMD Athlon II X Regor GHz x MB L Cache Socket AM Mobo manual also says it will only support with one DIMM per channel I tried in dual channel one DIMM per channel and only one DIMM only GB no change I have tried some Overclocking settings - - - V MHz but all I get is the system refusing to boot Am I missing something Is it supposed to work at MHz or not Thanks in advance

A:CZ Platinum DDR2 1066 only runs at 800MHz

I read this on another forum:

To acheive 1066 with this RAM kit you need to adjust your DRAM voltage to {2.1 - 2.2 volts} . Unfortunately there is
no capability to adjust this on your motherboard. You will have to upgrade your motherboard or run at default 800 Mhz speed.

The Mother Boad referred to was - asrock a780gxe/128m
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A:4GB DDR2-1066 Installed... Win7x64 Not Booting

According to your QVL, that brand is not supported at the speed. Have a look here.

ASUS - Motherboards- ASUS Rampage Formula
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Hi, I have the Gigabyte GA-965P-DS3 Rev 3.3 mobo with the latest F14 BIOS.

Although I can no longer find it - I once came across an internet review which had tested my mobo with DDR 1066 rather than the supposed maximum of 800 MHz.

My mobo link is:-

What will happen if I put 1066 memory in the mobo? Will it clock down to 800 MHz? the Board does have very good overclocking capabilities.

Thanks in advance


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i found in the site that you can use this type of RAM in mobo ECS P4M800PRO-M2...
is this true?????
but in the manual it said that it support only DDR2 533.. I am confused????!!!

here is the link: (V2.0)

A:[HELP] Is my mobo really support DDR2-8500 1066?

yes, it is supported, as long as you don't go above 2G of memory because 2G is the maximum for your motherboard.
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Is this considered value RAM? I bought 2gigs of it for $50, installed it and it is defaulting to DDR-667. Seemed like a steal at the time

I had to manually go into BIOS and up the voltage and increase the clock - It is now at DDR-800
And while were at it, advertises this
as SLI ready, but I do NOT see where you would hook up the SLI cable. Anybody?
Just a few kinks with the new build

A:Kingston HyperX 2GB (2 x 1GB) 240-Pin DDR2 SDRAM DDR2 800 (PC2 6400) Dual Channel De

From the newegg comments:

I feel as like I should clear up the confusion about this memory. This ram is programed to default to DDR2-667 at 1.8volts instead of the DDR2-800 at 2volts. This is because most motherboards default to 1.8v, and it would suck if you were trying to build a new computer and you couldn't boot because your memory only ran at 2v. That's why kingston made it so you can run it at 1.8v(although at a slower speed) and change it to 2v later. YOU NEED TO MANUALLY SET THE VOLTAGE TO 2VOLTS AND SPEED TO DDR2 800 @ 4-4-4-12 IN THE BIOS. If you don't do this then you are wasting good memory. If you don't believe me then read the data sheet here: to expand...

So that makes sense...

Also I think your 2nd link is the same as your first
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A friend of mine is upgrading his computer. He has an XFX 680i lt sli motherboard. What is better in RAM: 2gb at 800mhz or 4gb at 667mhz? He has XP. Also, should he get ECC ram, buffered ram, or normal ram? He wants to play games such as WoW, DIablo II, and maybe Crysis.

A:Ram question: ddr2 4gb at 667mhz or ddr2 2gb at 800mhz?

Four. You definitely notice a 100% difference in amount over 25% in memory speed - which isn't really noticeable anyway.

That mainboard uses normal DDR2 memory.
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...can it be replaced with PC2 5300 DDR2 CL5 DDR2 SODIMM. Will my computer explode if I use it? It's a IBM Lenovo 3000, 1.5ghz, w/Intel Celeron M. Thank you

A:My system uses PC2 4200 DDR2 CL4 NP DDR2 SODIMM

Go here and on the right,.. click Scan My System
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Hi all,

I have Intel's D-915 processor, D102GCC2 Mob, 512 MB 533 Mhz DDR2 (UMAX)

I want to put another 1GB of DDR2 RAM in other slot. Can both work together well.

Also if I will go for 1Gb 667Mhz DDR2.. then ? Any problem..

Plz Suggest..


A:can a 533MHz DDR2 RAM and 800 Mhz DDR2 RAM work together ?

If your motherboard is limited to 533 mhz then a 667mhz memory stick will be automatically underclocked to 533mhz, defeating the object of buying the faster ram. As for if 2 sticks of 512mb and 1gb work together side by side, I've never tried it but suspect it would work. If you get any problems, make sure you put the 1gb stick into the 1st memory slot (the slot your 512Mb stick is in at the moment) and put your old 512mb stick into the second slot. I remember reading that the CPU is happier running a bigger memory stick in the 1st slot. It may be an old wives talke, but its worth trying if you get problems.
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i have an old laptop which has 4 gigs DDR2 using 2 channels, is there any adapter or linker which would allow me to connect my laptop memory to my desktop sized slot

A:DDR2 Laptop to Desktop DDR2

Yes. See Adapter / Tester : Laptop DDR2 200 pin SODIMM RAM to desktop DDR2 240 pin DIMM RAM: Computers & Accessories
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Im throwing together a machine for my GF.. I have a processor but need to get a socket 478 mobo.. The one I was looking at uses DDR2-400 memory and I have some DDR2-800 memory sticks laying around..

Will it work ok to use the DDR2-800 sticks on a mobo that accepts DDR2-400 memory?

A:Ok to put DDR2-800 memory on a DDR2-400 mobo?

"Typically" you can run faster memory in a machine rated for slower memory - the memory simply runs ate the mobo spec. That said, memory issues are always subjective to the varying tolerances of the memory itself and the motherboard.

I just combined 333 and 266 rated memory in a laptop that's spec'd at 266 - it flies with no issues.

I think you'll have no problems.

Just make double-sure that all the other specs are identical such as voltage, both unbuffered, both unregistered, same latency/speed specs e.g. 2-5-5-5, hopefully both with or both without SPD (or maybe all memory come with an SPD these days?).

Try to run it with the memory, it won't cause any damage. If you start getting errors/crashes, you know it doesn't work.
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heres a link to the motherboard:

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are they interchangeable?

if my board has DDR2, can i use the ddr2 dual channel?

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My system specs:
Asus P5N32-E SLI (680i chipset)
Core 2 Duo E6750
750W Zalman P/S
500GB HD

2 sticks of 1 GB GSkill PC2 6400 (800mhz)
2 sticks of 1 GB Kingston HyperX PC2 6400 (800mhz)

But its running at 667? Why??

Thanks for any help

A:4x1 GB DDR2 PC6400 running at 667 mhz?

Ok , I am just double checking some thing on your board
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HI there newbie here i have just installed 3gb of ddr2 800mhz. it originally had 1gb pc2 5300u. but is showing speed in cpuid as 266 mhz i checked in bios and my dram freq was showing 532 mhz double what it showed in cpuid so i set it to 800mhz in bios and windows wouldn't start so i rebooted and dropped it to 666mhz giving me 333mhz in cpuid is this correct as i thought it should show as 400mhz? my mobo is a original acer with flashed modded bios so i could adjust cpu and ram freq

any advice would be much appreciated

A:ddr2 pc2 6400 u running at 333?

When you are dealing with DDR ram, it's double data rate. Thus....DDR2-800Mhz is RAM that "when doubled' runs at 800mhz....but it's standard front side bus speed is 400mhz.

With PC's, the CPU's run at a certain front side bus speed and then have a multiplier. Therefore, a chip like an Intel Core 2 Quad Q9550 runs stock with a 333mhz front side bus and an 8.5x multiplier. Thus, true speed is 333 x 8.5 or 2.83ghz. In a case like this, the default speed the RAM would run is 333 x 2 (since it's DDR) RAM would run at 667mhz. It doesn't matter whether you install DDR2-800, DDR2-1000, or's going to run at 667mhz because it's effectively 2x the speed of your front side bus.

So, with an Intel Q9550...if you wanted your RAM to truly run at would HAVE to increase the FSB speed of your CPU to 400mhz......but be aware when you do this, your CPU now runs at 400 x 8.5 or 3.4ghz. You are now overclocking and have to worry about heat and stability.
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My current ram is DDR2 so will any DDR2 work?

A:If my RAM is DDR2, will any DDR2 work?

Its best to match the speed at which you know your motherboard will operate.

Which motherboard (computer model number would suffice) do you have?
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A:WEI Same for DDR2 800 and DDR2 667 - Confusion

Did you re-run the assessment?
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Hi I just bought seperate parts for my computer from newegg and I realized that when i changed my board, i forgot to make the ram match! I have ddr2 533 memory but my mobo supports ddr2 800, could the 533s still work?

A:DDR2 533 fit in a DDR2 800 slot?

Yes, they are physically the same but you may decrease the performance depending on what processor you have.
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A:Mixing ram 1gb ddr2 667 and 2gb ddr2 800

Since you did provide computer specs, I assume 1GB is allocated to onboard video memory.
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Memory on the video card has nothing to do with memory on the computer.

Please be aware that the 8500 is not a gaming card... unless the games were made before 2004.
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A:Ddr2 ram

you currently have 6gb of ram, what are you doing that you require another 2GB? for majority of people 4GB is enough. So unless your doing some heavy photoshop graphics your probably wasting money on more ram, you may want to use that money toward something else to see more of a performance increase.
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A:DDR2 ram

Depends if the ibookg4 supports DDR2 ram, please post your current system specs
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A:1.5gb of DDR2 ram

Yes. The motherboard supports up to 8GB of DDR2 memory.
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A:DDR2 Ram

RAM will only work at the FSB of the motherboard, or at the speed of any slower RAM fitted. Fitting faster RAM will not make it run faster than the FSB of the motherboard.
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From what I've hard it needs DDR or DDR2 ram but which kind will work on this machine?

A:Do I need DDR or DDR2 Ram?

From the gateway site it uses pc2700 ddr memory.
BTW if you input the serial number into the gateway site, you can see everything you want to know about that system.
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Windows Xp, Media Centre Edition, Ver 2002, Intel Celeron(R) D 3.20GHz, 1Gig Ram.

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A:DDR2 Ram

You need the RAM that is compatable with your motherboard.
The CPU and Windows version give no hint to that.

As Windows MCE was OEM, its likely to be a brand name (HP, Dell etc), so if you could supply the actual maker and exact model, we could probably help more here?
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A:How much better is DDR2 over DDR ??

Anybody ??
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Q: Ddr2

I have 2x2 Gb DDR2 memory, but I would like to have a total of 8Gb, is it possible?


Hello Stefi,

Yes, it sure is. Looking at your Asus P5QLD PRO motherboard specs at the link below, you could just add another set of 2x2 GB DDR2 RAM modules of the same MHz timing to have a total of 8 GB.

Motherboards - P5QLD PRO

If you are not sure of what your RAM timings are, then the free program Speccy can help show what they are.
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is it advisable to combine ddr with ddr2? what's the difference between the two? thanks

A:ddr and ddr2?

NO. and you can't. Please bother to read the FAQs and the guides regarding ram.
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I was wondering if i get a new motherboard with ddr2 slots, could i still use my DDR ram in there because i have about 2.5 gigs of it and i dont wanna get DDR 2 chips, and i ndesperately need a new motherabord. any suggestions as to what board i could get, i need one with a good sound attachment, sata, . right now i have a gateway 702ge system and im looking for something similar with a little more pep to its step.

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I'm buying 1 GB of RAM, and my motherboars supports both DDR2 and regular DDR. My question is, DDR2 is better yes, but how much better? Is it worth spending more money on? And is there a noticeable difference?


Short answer,yes it is faster but is it worth it to you.What do you use the computer for?
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Will my DDR2 533 work with this MOBO? I ask because I know AM2 has some issues with compatibility.
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to run dual channel do I have to have my sticks in slots 1 and 3? Right now I have my sticks in 1 and 2 right next to each other. They still register as 2 gigs

A:ddr2 ram

In most cases, you need memory in the same-colored slots in order to ensure dual-channel mode. If it's a newer Asus, chances are you have two yellow slots and two black slots. Make sure you have dual-sticks (same size) in the same color slots for dual-channel.

The best way to tell without opening the case is to download/run CPU-Z and check the "Channels #" for Dual. If it's not Dual, then you can swap your memory around to get this working.
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I have a 6GB mix of OCZ Reaper 8500 DDR2 and 9200 DDR2 running at 857mhz, 4-3-3-5-2T in my system and it's great. I also happen to have a 2x 2GB kit of G.skill around here.

I am contemplating swapping the 2gb of 9200 in my system for the 4gb of G.skill giving me 8GB instead of 6GB. I'm mainly just curious if I can make it work more than anything, but curious if there is any real point of 8GB vs 6GB of DDR2.


A:8GB vs 6GB DDR2

If its just an experiment go for it and have fun, but unless you really need the extra 2gb, I doubt that you're going to see increase in performance...
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Hi guys a quick question, is it possible to have 2 GB DDR2 800mhz and 1 GB DDR2 667 mhz in the same pc?
here's the link to the pc, im thinking about
ASRock > Products > Nettop Series > ION 330

A:800 mhz DDR2 and 667 mhz DDR2 in the same pc?

Yes, but the DDR2 800 will clock down to the DDR2 667 speed, so they will all run on that specified speed of 667mhz, non dual channel.
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If i get a 2GB DDR2 will it perform any adavantage? I am currently using 4GB DDR2. Will the 2GB be over taken by my 4GB? Im wondering this because one of my games doesnt look as good as i want it plus i want to enhance performance.

EDIT: I have a dv4 1275mx will the DDR2 fit?

A:If i get DDR2...

looking good and performance are two different animals, more so when it comes to laptops.

More memory might be able to yield more FPSs (Frames per Second... speed!) if by that much, better visual of graphics comes from your Video card & CPU and I am thinking that having an Onboard chip as a card, does not do well when playing games.

Now, if you give us a little more feedback of what kind of games and what you use the laptop for, we can perhaps help better?
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which one should i go for with my P5Q pro mobo + E8400

OCZ Reaper 2x2GB 1066 MHz
G.Skill 2x2GB 1000 MHz PQ or
Kingston Hyperx 1066 MHz

with these can i run [email protected]

A:Which DDR2 Ram

I think its much of a muchness but heres the qualified vendors list from Asus P5Q-PRO-QVL.pdf

anything not on that list may give issues and need manual setting for timings and voltages but may also give no problem if you carefully match them to the motherboard
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Hi all,
(Don't know how much of this you need to know but...)

I'm about to buy a new machine with an Intel LGA 775 Pentium 4 /D CPU
and a P5RD2-VM motherboard. It's coming with 512MB of DDR2 SD RAM and it says PC4200(?)

I've got 256MB of DDR RAM (PC2100, CL2.5) from my old machine and I was wondering if I can combine them?

I'm expecting a short answer 'no', long answer 'noooooooooo' here!


A:Can I use my old DDR RAM with my new DDR2 ?

No, DDR2 has a different pin count than regular DDR, not to mention different clock speeds. In all essence, you wont even be able to get DDR1 to fit in a DDR2 slot without alot of breaking things.
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What does the following mean:

Cas Latency

and what areas will make it more faster (example will Cas Latency 4 be faster then Cas Lantency 3; ECC vs Non-ECC)? Is higher the voltage better?


A:Ddr2 Ram

You'll want to match RAM voltage to your MOBO, 184pin 1.7v for example.
Lower Cas letency is faster, you can find 2, 2.5 and 3 usually, but the lower the latency the less stable the RAM is. Usually if you find a 3 it is Buffered and/or ECC for stablity.
ECC is error correcting code, it detects when your RAM has errors, which is nice, and can even fix single bit errors. Usually ECC is used in servers and isn't of HUGE importance in most home PCs, registered RAM is recommended if you plan on breaking the gigbyte barrier with ram though.
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ok this is about to drive me crazy. I already ordered this mobo and some corsair xms 4-4-4-12 ddr2-800 rated at 2.1v. alot of people have been saying the mobo only goes to 1.95v on the ram and therefore alot of memory incompatibilities. but yet a few people said they have got 2.1v ddr2 to work with setting it to 1.95v????

A:M2N-E with DDR2 2.1v??

All you can do is try it for yourself.
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First off I'd like to thank loserOlimbs for his help in my last issue.

OK, it's just a quick question. I have 1 gig of dual channel(512x2) DDRII 667 and I was wondering if it is OK to put it in a DDRII 533 motherboard?

I'm at work, so I don't know when I can respond. Thanks.

A:DDR2 667 to 533?

Yes, it's okay.
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Q: Ddr2

Hi, lately i have been hearing that the DDR2 RAM has been becoming standard...Can someone explain to me why? I always though that DDR4 was the more advance ones.


i think you're being confused with DDr4 with ddr 400. DDR400 is basically ddr. With 2700 and 3200 version etc...

DDR2 is faster.
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Is there a motherboard that is DDR2 800 compatible and has SLI capabilities???

i have a stick of corsair DDR2 800 and wanted to get an SLI Mobo, if there is no SLI + DDR2 800, should i just go with a Mobo that has DDR2 and forget the SLI or vice versa...this is a gaming PC so i wanted to get the most performance i can get. thanks
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i currently have installed ddr2 ram 533 mhz ,i now want to install a ddr2 ram 667 mhz can i operate both of them together?

A:different fsb of ddr2 ram

Hello and welcome to Techspot.

It`s not considered to be a good idea to mix ram speeds, as it can cause stability issues on some systems. However, there`s nothing to stop you from trying. Please be aware that the faster ram will automatically be downclocked to the speed of the slower ram.

Regards Howard :wave: :wave:
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I have 2 gigs pc3200 ddr 400 on my mobo and I'm looking to up grade my ATI 9550 256mb AGP card, which has DDR mem.

My question is will an AGP card with DDR2 memory be compatable with the DDR on my mobo?

If not what AGP card would be a better upgrade?

A:DDR and DDR2

No problem. Memory on a video card does not have to match your MB memory.
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What would be better from these two??


one of them is DDR and the other DDR2.....and how come the DDR2 is cheaper???

Thanks for your help!

PS: can i use a SATA drive drive to boot up a computer? or does it have to be IDE?

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what exactly is the difference between ddr and ddr2?

is it that ddr2 has 2x the bandwith?

and which one is better/faster?

A:ddr vs ddr2?

Hi. Here is something to read that will explain it better than I can.
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For My PC
I have 1 2gb of 667 mhz ddr2 and 1 2gb ram of 800 mhz ddr2... What is the RAM operating speed ?

Also tell me i need to upgrade to 6gb RAM on my desktop !!!
i wanna buy another 2gb ram ddr2 coz my dg33 fb supports ddr2
which shud i buy ???

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Hello all,
Think I know the answer to this...but I have the option of running my DELL using:

4 GB 1066 MHz Dual DDR3


8 GB 667 MHz Dual DDR2

I'm currently running the first.

My Windows Experience Index, for what it's worth, gives me a 5.9 in the RAM category (and the HD category) but 6.8 - 6.9 in the others (processor, graphics, gaming graphics).

Thanks in advance.

A:8 GB DDR2 vs. 4 GB DDR3

Hi sjcecran and welcome to SF!
Four words for you: stay where you are!
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I just ran CPU-Z to find what chipset I had. Got what I wanted but I was surprised to see my "DRAM frequency" was listed as 266MHz. My machine supposedly has DDR2 SDRAM running at 533MHz - does the 266MHz translate to 533MHz because of the "2" in DDR2 ? or was I cheated by my computer vendor ?


A:DDR2 speed

Possibly. Try this tool to get even more info:

By the way what computer Make and model are we talking here?
But just check the above first
You can attach the report if you like (note I say attach, not paste)
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i have a laptop toshiba a 300 15 c core 2 duo t 8300 2,4 ghz with 800 mhz bus speed processor , its suitable to install ddr2 800 mhz on my laptop, my rams are 667 bus speed

A:DDR2 800 mhz bus speed

probably not. It may not support ram that high, but its possible that since its 667 it may also support ddr2 800. You may just have to increase the voltages a tad bit on the new ram through the bios
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can anyone give me some information ? i am using asrock motherboard pt880 4core, can i use2 ddr11memory cards 240 pin into two slots provide and at the same use 2 ddr2 memory cards 184 pins in to the slots provided, in other words i will be using 2 cards of 240 pins and 2 cards of 184 pins at the same time, or do i need to use either of the 2 cards at a time?

A:DDR1 and DDR2

2 x DDR2 DIMM slots
- Supports DDRII667/533 non-ECC, un-buffered memory

2 x DDR DIMM slots

DDRII and DDR are supported separatelyClick to expand...

ie Just use 2 DDR2 Dimm cards only


DDRII and DDR2 are the same thing
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Which one is faster,stronger,better?(especially for high end gaming and HD blue ray movies)

CORSAIR DOMINATOR TWIN2X4096-8500C5DF DDR2 4GB (2X2GB) PC2-8500 (1066MHZ) CL5 DUAL CHANNEL KIT Timings: 5-5-5-15 (CAS, tRCD, tRP, tRAS)
CORSAIR TR3X3G1600C8D DHX DDR3 3GB (3X1GB) PC3-12800 (1600MHZ) TRIPLE CHANNEL KIT Timings: 9-9-9-24 (CAS, tRCD, tRP, tRAS)

My CPU is Q6600

A:DDR2 CL5 vs DDR3 CL8

DDR2 provides the best value for the buck. Having said that... if you are installing a high end CPU, DDR3 is best for you!
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Hey, my grandparents bought some crappy acer computer, and we want to upgrade it a bit.
The thing is, I need to know if the Mobo is compatible with DDR2, and if it has a PCI-E slot.
The problem is, I can't find anything about the mobo on the web. I have SIW and everest, but even there I can't find it.

Edit - Without opening the case, cause else I would've done that

Greets, Thas

A:PCI-E, DDR2, how to find out?

If you launch SIW and click on memory in the left pane, what is indicated in the right pane?

Also, what is indicated for video?
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i have a mach speed p4mst-890 mother board. it will take up to 4gb of memory. ddr2 533 memory. but the memory i've looking at does not say whether it is high or low density. the manual does not say which...... so would hi or low work in my system.... thank's......

A:memory ddr2

High density memory is basically factory seconds that will
only function on certain motherboards at full capacity.
Always better to stick with low density.
Branded memory,like kingston,corsair,OCZ,crucial and so on
are usually low density.
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Would 4GB of DDR3 be the same as having 8GB of DDR2?

Which would you rather have?

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I was wondering can i set ddr2-800mhz ram on my mobo MSI K8N Neo4 nforce-4? At the moment i have 1,5GB DDR1 400mhz RAM. the guy at the computer shop said that i cant upgrade ddr2 on my motherboard, but i see that people on the internet have dual core processors and dd2 ram on the same motherboard.
sorry for my englesh.

A:DDR2 RAM on an old motherboard

I happen to have that motherboard in one of my PCs and it is not compatible with DDR2 RAM. DDR2 is not backward compatible with DDR RAM. For one thing the notch is in a different position so you can't physically put in in the slot.
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Two DDR2 sticks:
OCZ PC2-4200 Enhanced Bandwidth labeled for 3-2-2-8
PDP Patriot PDC22G4200+ chips labeled for 3-2-2-4

Both chips are marketed to run at DDR2-533, but obviously can be overclocked. My question is which chip would be better? When clocked for DDR2-667, does it increase the bandwidth for the chip from the DDR2-533 rating of 4.2GB/s? Would it be better to just go with a DD2-667 'labeled' stick like the OCZ w/ 4-4-4-8 and bandwidth of 5.4GB/s??

Hopefully someone here knows something about overclocking or maybe could make an educated conclusion by these reviews:
OCZ PC2-4200 EB
PDP PC2-4200 Patriot

Is it possible to just use similar tests from each review like the Sandra 2004 Standard Buffered Memory Test at 667 speeds??

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Could someone please explain to me the difference between ddr2 and ddr3 ram. I've heard many different explanations and am still confused. My understanding is that the grooves that slot into the mobo (where the brass contacts are) is simply at different positions on the ram modules and the module will only fit into the mobo if it is supported. Am I correct?

A:DDR2 vs DDR3

Yes the DDR2 modules and the DDR3 modules both have 240 pins. The keyways are in different locations so you can only install DDR3 modules in a DDR3 motherboard. DDR's highest speed is 400MHz. DDR2's highest speed is 800MHz. DDR3 highest speed is 1000MHz
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hello guys just a little help needed is there a way to find out what type of memory i have in my pc with out taking it out
i no its ddr2 but i need to no the best speed and all the other stuff
i want to take it from 256 ddr2 to 2 gig
2x 1gig sticks but i dont no which type to get
i have a packard bell i start with windows xp home
thank you any help will be good
any more info i will try to help

A:ddr2 memory

Go here, click scan my system, it will show what RAM you have in there, as well as what RAM (of Crucial's products) will work in it.
You can also go to Corsair's site or and manually insert your PC model number to find out which of their products work in your PC (to do some price comparison)
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Hey guys,

I could go with the tried and true Northwood core and settle for 200 MHz DDR and save some money or I could go the somewhat sketchier LGA775 route and spend more and get a computer that doubles as space heater but be able to use DDR2.

Based on the tradeoffs, what would you go for?

Thanks much!


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I am getting to the stage with my desktop that it is painfully slow and are thinking off upgrading ram as a quick fix. This is just to get it through the next year without me throwing it out the window. However, I would be wondering with RAM the sort of questions: how much, which type is the most bang for your buck and would be looking for recommendations for individual products. Note: My price range is around $200.
Appreciate the help!!!

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Hey gurus,

Here is a quick question:

I currently own 8GB's of - OCZ NVIDIA SLI-Ready Edition 4GB (2 x 2GB) 240-Pin DDR2 SDRAM DDR2 800 (PC2 6400) Dual Channel Kit Desktop Memory - Desktop Memory. I am thinking about buying 4x2Gb of - OCZ Reaper HPC 4GB (2 x 2GB) 240-Pin DDR2 SDRAM DDR2 1066 (PC2 8500) Dual Channel Kit Desktop Memory - Desktop Memory. Is this a good move? Will I see much of a difference in performance from the 8Gb's that I currently own now?

Thanks guys

A:DDR2 Question

Hello Gudziel,

Sorry, but you will not see that much of an improvement from 800 Mhz to 1066 Mhz.

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Hi, does ddr2 677 really make that much of a difference compared to 533?

A:Ram Speed DDR2 533/677

Does having a 3.2GHz P4 make that much of a difference over a 3.0GHz one? Same answer.
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Hi, great forum you guys got here...
Just had one small question-
I have a Gigabyte 8I915P Duo Pro motherboard...and it supports both DDR and DDR2 RAM. I am currently running 2 x 512MB DDR2 PC5400 and was wanting to add some more it ok to add regular DDR memory in the slots adjacent to the DDR2? Or do I need to look at running 2 x 1024MB DDR2 in order to increase my memory? The mobo has a pair of DDR2 slots and a pair for the DDR.
Looking around the web I have yet to find a definitive answer.

Thanks in advance!

George Widener

A:Mixing DDR2 and DDR

Well, adding DDR to it, even if it will work, is bound to seriously affect the performance of the memory subsystem.

From the manual for that MB: Note:Mixed mode, populating DDR and DDR II memory modules simultaneously is not supported.

I'd say the answer is no.
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If I buy DDR2 RAM chip. Will it fit and run fine in a motherboard that doesn't have DDR2 capabilities?

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I currently have an ASUS A8N-E motherboard and some DDR400 RAM. If I'm looking to upgrade/replace my current ram, would this motherboard support DDR2 ram? I have tried researching it but can't find many answers.

Also any opinions on which is a better choice (DDR400 vs DDR2) would be appreciated, thanks!

A:DDR2 Compatability?

t3mp3st said:

I currently have an ASUS A8N-E motherboard and some DDR400 RAM. If I'm looking to upgrade/replace my current ram, would this motherboard support DDR2 ram? I have tried researching it but can't find many answers.

Also any opinions on which is a better choice (DDR400 vs DDR2) would be appreciated, thanks!Click to expand...

Your board will not accept DDR2 ram.
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Well a mate of mind bought some DDR2 Kingston RAM but then decided that he didn't want it. So instead of sending it back he gave it to me.
Well right now I have DDR ram inside of my computer but I was wondering would DDR2 ram work?
Would it be okay if both of them were inside the computer at the same time?
I know completely nothing about computers so could you guys please help me?

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I have a question for you Knowledgeable people ;-) I have a Pentium D Dual core Dell E510 computer running windows XP with (2) 512mb sticks of DDR2 ram 4200. I would like to add more. I was thinking about adding (2) more sticks of 1GB 4200. For a total of 3 GB.Then someone told me It would be a waste of $. They said just to add 2 more 512 mb modules as XP wouldn't or couldn't use the extra 3rd GB. Is this true? Any help would & will be greatly Appricated. Thanks,

A:Adding more DDR2 Ram?

Some MOBOs have issues when all four slots are populated, so I would not add two more 512MB sticks.

A better option would be to add 1GB sticks.Then if you do have a problem with four sticks as stated above, you can remove the two 512MB sticks leaving you with 2GB (which is probably enough anyway).
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My friend has a HP Pavillion computer that has a 256mb 3200 in slot 1 and slot 3.He has just purchased 2 1 gig sticks that are 4200 speed.Would he place the gig sticks in 1 and 3 slot?Would someone who knows the answer to this please share your knowledge.There's 4 slots in this computer.

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I need to buy a new motherboard, and I thought an AM2 one with 1394, onboard video and 2 ide connectors would be good value. gigabyte and asus seem to match that, and the ASUS M2NPV-* series looks reasonably priced.
I want to buy 2x1Gb 800Mhz memory, but all the ones on the QVL are 3 or 4 times the price of cheaper modules like transcend's jetram. Yet they all are CL5 (whatever that means) and require 1.8V.
Is there something beyond these 2 parameters that I must look at, or will the jetram modules work? I can't understand why there are such huge differences in price.
Thank you, Chris

A:more ddr2 confusion will advise on the best ram for your system