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Dual-channel RAM -- more in channel 1 or 2? Does it matter?

Q: Dual-channel RAM -- more in channel 1 or 2? Does it matter?


i understand how to set up dual channels with matching pairs - that is not my question. What i can't find the answer for is this:

If i have a matching pair of 512 = 1g
and a matching pair of 1g = 2g,..

Does it make a difference which pair is in which channel? Should i have 2g in channel 1 and 1g in channel 2, or would this make no difference?

thank you!!


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Preferred Solution: Dual-channel RAM -- more in channel 1 or 2? Does it matter?

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A: Dual-channel RAM -- more in channel 1 or 2? Does it matter?

You can run different stick of RAM at the same time in Dual channel asynchronous, but I think they'll operate at single channel speeds.
If you decide to run in asynchronous mode, I think that it doesn't matter.
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A:Solved: Can dual channel memory be installed in channel 1 rather than channel 0?
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i believe my mobo only accepts single channel memory, i tried to upgrade my system with dual channel, and it reboots constantly. please advice!!!!!

A:single or dual channel memory does it matter?

There is no such thing.....

The memory DIMMs are neither single or dual channel, it's the motherboard that determines how the RAM is accessed. Did you match exactly the specifications of the original RAM when you upgraded?
Please follow this link to Tedster's guide for upgrading RAM:

When RAM is sold as "dual channel" it simply means that there are two DIMMS (each with half the amount of the upgrade value), one for each channel of a dual channel motherboard.
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Hey everyone I got a bit of a problem here and I'm at a loss on what to do to fix it Some background about the situation would be a good place to start A few days ago I came home from work and found my PC in a quot lights are on but no one's home quot state The power button was lit up and the fans were in motion but the monitors were in power saver mode not the normal on state with the blank screen saver I tried moving the mouse mashing on the keyboard but nothing happened So I reset the machine and it just went to a blank screen no beeps or messages just the same ole lights on no Stopped Suddenly Single Working, Remains Only Dual Channel Channel ones home deal again Now before this I had been having memory problems with blue screens saying quot memory management quot and quot IRQL not less than or equal quot So I thought it might be a bad strip of ram and even bought two Dual Channel Suddenly Stopped Working, Only Single Channel Remains more strips to replace the ones I had removed In the process of testing each strip I discovered that one was bad That was not the fix by the way After putting in the new ram in for a total of GB's of ram figured if I'm gonna buy new ram might as well increase the total amount it booted up and no more blue screens after loading into windows YaY it was fixed or so I thought Dual Channel Suddenly Stopped Working, Only Single Channel Remains A few weeks later the above incident occurred and the only way to get the PC to boot up was to pull two strips of the ram and insert the remaining strips into slots and for a single channel configuration Didn't matter which set of ram I used just so long as I didn't mix two different brands on the same channel It's never needed to be set in that manner before CPUID reports it as single channel with a blank entry in the DC mode so I assume its ganged up and in single channel YUCK While the PC is operational since I'm typing this up on it I know its not at its optimal configuration which annoys me to no end After researching the problem via Google and numerous forum post with info unrelated to my exact problem I decided to write up a post in the hopes that some one out there can help me to figure out if the problem lies in my motherboard doubtful or in the processors integrated memory controller I think its the Phenom's memory controller that is faulty or failing It's been in operation since almost continuously and its been a good computer and still is I think the new ram might have been the culprit that shot my memory controller in the back There CAS RAS ratio's do not match by one number one is at CAS the other set CAS and when all GB's was installed the ram would run at not the mhz it's rated to run So like a dumb ass not knowing enough I went in the BIOS and overrode the auto setting for the ram and set it mhz vs the mhz it was defaulting to Did I inadvertently over work the memory controller All the current Ram I have is working and not faulty So that only leaves the Mobo and the processor I don't have tons of cash to spend I'm a poor man So before I bite the bullet and buy a new Phenom to replace the one I have I'd like to try and verify if that is indeed the problem System Info Asus M A -M Motherboard AMD Phenom II X B E Ghz unlocked and over clocked it once but it was unstable back in NVIDIA GT GB mhz Core mhz Bit Width Bit to GB's of Ram when it worked it was at GB's now it's at GB for now SATA Hard drives all independent of each other not raided W OCZ PSU I think that's the gist of the system info one would need If it is indeed my processors memory controller and there is nothing that can be done with what i have on hand to correct the problem then I plan on buying a Phenom II X It's about the same price as my X was in Plus it has the same socket and should work with my motherboard Could the motherboard some how be at fault how can I test this without additional hardware Here is more information about my memory Sorry I didn't post enough information he... Read more

A:Dual Channel Suddenly Stopped Working, Only Single Channel Remains

Britton, go to the asus site for your motherboard. Download and install the latest drivers. Download a copy of your manual and review the bios settings. If need be manually input the correct timings for your ram. Also make sure to follow the ram installation documentation for which slots to use to enable dual channel.
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It completes the Windows XP loading screen, then reboots... constantly, until I change it back to Single Channel mode.

Is there something wrong with my RAM? or is it the motherboard? or my PSU not giving the mobo enough power? I dont have every power cable plugged in, I have a 20 pin ATX power in the 24 pin plug, and the 4 pin ATX power plug and a 4 pin molex cable plugged into the motherboard. Could this not be giving it enough power?
Many thanks, system spec =

AMD Athlon 64 4000+
DFI Lanparty UT nF4 Ultra-D
2 x 512mb Crucial Ballistix PC3200 DDR400
Connect 3D X1800XT 256Mb
2 HDD's etc.
Antec TrueBlue 480W PSU.

A:System reboots constantly, when I change my RAM from Single Channel to Dual Channel

Check your mobo manual, to see in which slots you need to put memory sticks to make it work in Dual Channel mode.
AFAIK you need 1 each of the same size/type in slots 1 and 3 (yellow) for DC.
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A:Dual Channel 2x256 DDR400 or Single Channel 1gb Mixed DDR RAM

& we are supposed to get your system specs how ? You could be using that Ram on a 600mhz Celeron for all we know.
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My current 2x2GB runs in dual-channel mode. If I buy an additional 4GB stick, it will run in single-channel. I use the desktop mainly for gaming purposes. So, I just need to know if mixing 2 modes will cause any problems?

A:Any drawbacks to mixing single-channel and dual-channel for RAM?

Shouldn't cause any problems assuming it is otherwise compatible.

The difference between single and dual channel is minimal for most usage scenarios. If the RAM you have now magically went to single channel 5 minutes from now, you likely wouldn't notice.

You could discard the 2 x 2 you have now and replace with 2 x 4 and get dual channel, but nothing at all wrong with instead spending that money on cigareets, whiskey, and wild, wild women. At least you'd have something to show for it.
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Would it just clock the ram down and if so would there be a huge performance hit?



A:Dual-Channel Memory in Single-Channel Motherboard

They would work in a single channel motherboard, and it wouldn't effect the speed of the actual RAM however it would effect the overall speed because the memory wouldn't be able to send data back and forth as fast as it could in Dual-channel motherboards.
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Hi.. So as usual im an idiot and i looked into my case and am still debating if my ram really should sit right next to eachother and i started Speccy and it said that i had single channel ram 2 different channels with 16GB total. I got confused becouse the motherboard manual said i should put the ram like i did.. So now i moved one ramstick, Whent into bios to check if everything was working like it should and now i have dual channel 16GB ram 8x2.
This started a question.. What performance boosts does dualchannel give over single channel.. I know its better but just. In what cases will it be "better" and will you notice it? And in witch scenario will you notice it?

A:Single channel VS Dual Channel RAM performance boost?

almost all mother boards that have 4 ram slots have colour coding. the 2 the same colour, normally a space in between is the dual channel setup.

dual channel effectively doubles the memory bandwidth and halves the cache.

in real world terms youll get a 5-20% performance increase with dual channel when running bench marks.. you probably wont notice it in terms of speedyness though.
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A:Dual Channel memory in single channel board?

Well, I can say I solved my own problem.

After I spent the last 4 hours trying to find the problem. I ran a bunch of mem tests, cleaned the mem slots, etc... It turns out it wasn't a hardware issue at all. I was wiggling my mouse on start up and noted the time it froze... and every time it froze an application was launching in the system tray.

Turns out it was Norton F'ing Anti Virus....

The second it launched the computer froze. So I booted in safe mode and disabled the start up and all other functions of Norton. Rebooted in normal mode, and sure enough, it worked! Without a hitch!

Now here comes the Beach of it. Since I couldn't uninstall Norton because I disabled it (i.e. nothing would run because all the extensions, shells and services for it were dead), I rebooted in safe mode to uninstall, BUT Norton doesn't work in safe mode... WHAT!? The damn program specifically states in a condescending dialog box that you "must reboot in normal mode to access Norton... blah blah blah"

What kind of Virus program doesn't let you access it in safe mode? Isn't that the point, to run a virus scan in safe mode? Piece of crap! But anyways, I digress.

So now I finagled a way to run in normal mode without Norton launching to uninstall it. Uninstalling as we speak, actually.


To answer my own question:
Yes, dual channel kits work in single channel boards (Just make sure you uninstall Norton before you put the new RAM in, haha).
- Veng

p.s. After this... I'm switching to McAfee or some sh*t.... Christ. YOU HEAR ME NORTON!? GO SUCK A FAT HAIRY LOBSTER C*CK!
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A:Solved: Dual Channel/Single Channel RAM Question

depends on you applications. When math is very important, dual channel might out weigh more RAM. If the system is generally sluggish, then more RAM is more important than dual channel.

Honestly, With Vista/ 7... I'd bump to 2GB period.
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I would like to know, does it really matter?

Posted via Mobile Device

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A:Dual-Channel & FSB: Calculating the bottlenecks (Is Dual Channel Worth it???)
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A:Dual-channel vs. Single-channel memory

Yep, although the actual effect may not be that noticeable. You are cutting the memory bandwidth in half.
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A:Mixing Dual Channel and Single Channel Ram Help!

:wave: Hello & Welcome to TechSpot :wave:

No, dual channel has (next to) nothing to do with the ram chips, but how the motherboard accesses the ram.

The reason you se Dual Channel RAM packages are that those are matched pairs (from the same production batch), and are supposed to give better results than two identical ram sticks bought separatly....

Also, buying dual channel sticks won't do anything for you if your motherboard/cpu doesn't support it. But you don't have to worry about that with your current mobo.

Actually, your mobo has a very good and detailed manual, which tells you how to use dual channel ram stick on page 19.
It even has support for using 4 sticks of ram, unlike many other (older) mobos.

So read that page, and if you still have questions, come back here.
If you can't find your manual, you can download it from here..
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If I wiggle the slot 4 in sometimes I get 8gb and dual channel RAM.

At the moment I have single channel and on 4gb, does that mean I am using 1gb of each of the 4 slots.

The ram is ddr2 2gb sticks x 4.

Do I need to clean the slot?

also Java based apps are crashing on 32bit and 64 bit.

Just clean the slot? what with, whats the best approach?



A:Single channel DDR2 but can run Dual channel

So magically I have 8gb and dual channel back.

But on the SPD tab the program only shows 2 slots in use.

Whats going on in my PC is it working like it should?
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A:dual channel ram in quad channel inputs.

I haven't seen any reviews of the x 79 boards, but I would be very very surprised if 4 sticks would not work.

Or even two sticks.
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A:Question: Dual channel vs. tri channel SDRAM

Hi milrobo,
just to add to what Rick said about memory amount, have a look at this test.,2264.html
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recently it came to my notice that i was running my RAM on single channel mode (2x2gb) on my dh67bl mobo. i saw it in cpu z and it showed single channel.

So, i changed my ram and placed it in identical slots and now the Cpu z shows dual channel RAM. but i don't see any visible difference in performance.

Why is it so? is there any performance difference in running the RAM in dual channel / single channel?

kindly advice,


A:RAM: Single Channel to Dual difference?

Hi Ray,

By placing your RAM into dual channel mode, you have effectively doubled its bandwidth, meaning that twice as much data can be transferred at a given point in time.

There should, in theory, be a noticeable difference between single and dual channel mode. However, this depends on the application. For many programs, such as Office (Word, Excel, etc), there will be a slight difference but not as much as you will see with graphics editing or movie conversion.

What is your current WEI score for the memory component? Rerun the assessment and you should see an improvement in this value.
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A:single channel and dual channel ddr400?

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A:can dual channel ddr be used at the same time with single channel ddr???
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A:Dual channel RAM in single channel mode

It will recognize it but not run in dual channel if the pair are mismatched.
Ps; The pair don't have to be exact matches by the way, same speed, type, size, and timings allow for two different brands to run in dual channel.
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Hello forum first time here. I have a rather important question.

I currently have Corsair Vengeance memory in my PC

This memory is Triple Channel

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Thanks in advance.

Corsair Memory Link:
G.SKILL Memory Link:

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A:Switching from Single DDR channel to Dual DDR channel?

Well there may be a setting in Bios to set it for dual channel
Or even a little jumper on the Motherboard that must be placed on the correct pins

You will need to download your computer's (or motherboard's if it's not a name brand) Manual
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Well, as it says in the title:
Is single channel 1gb as good as dual channel 2*512 mb.

I have tried to add memory to my mobo, but something went wrong and now my mobo only sees the first memory module. Really, I've tried everything and now I give up to return to normal life until I buy a new system.

So at first I had 2 * 512 mb memory at 800 mhz, dual channel.
Now I have 1* 1g memory at again 800 mhz, but single channel.

So is that ok, or is running at single channel much inferior to dual channel, even if I have the same amount of memory?

A:single channel 1gb as good as dual channel 2*512 mb?

No. Single channel is NEVER better than dual channel. Dual channel is always better and runs faster.

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A:Solved: Dual Channel ram in a dual channel unsupported mb.....?
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A:Dual Channel DDR on NON-Dual Channel Motherboard, will it work?

rmsilver7 said:

when I bought RAM for my SOYO I bought Patriot Dual Channel DDR 3200 1gb pair, but the ECS board I am switching to does not support Dual Channel, so can I still use the the 2 512 sticks normally on the new board or I do I have to get new memory or a different board?Click to expand...

1. Yes.
2. No.
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A:i7 - Triple Channel VS. Dual Channel

Well it seems that you are upping the CPU from 2.66 to 2.8 this would probably balence out the tripple down to dual channel performance loss if not beat it. But then you are going from 6gb to only 4gb of RAM so that would probably lower performance on some really demanding programs or some seriously intense multi-tasking.
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Hello All, i was wondering what is single channel and dual channel. This question came to my mind when i ran my PC with single RAM stick it shows "running on single channel" and when i inserted the second stick it says "running on dual channel". What is this?.......Also my graphic card crashes when i use the second stick, but runs smooth with single. I ran a memtest throughout night and got a blue screen in the morning. I will replace my RAM if it is faulty, but would like to know if there is some settings missing on my mobo.

A:Dual channel vs Single channel

Essentially, dual channel means that you have two channels/pathways for your CPU to access your RAM rather than one in single channel. It's kinda like having a 2 lane highway versus a 1 lane highway to drive on. Think increased space for data flow. More space, more data. It improves performance.
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A:triple channel ram with dual channel MB

Yes. I take it you mean triple channel memory kits. If so, you would use just 2 out of the 3 sticks. However, dual channel DDR3 kits are available.

Which motherboards were you looking at?

Welcome to Corsair :: Corsair DDR3 Memory Solutions

Kingston Technology Company - HyperX DDR3 -
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A:Single channel to dual channel

That depends on whether or not you have a matching set of dual channel memory installed.
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its about my old desktop computer..
abit nf-m2s motherboard, amd athelon 2.4Ghz prossesor, 2X512MB RAM(!!!).
i have installed windows 7 (32bit) on it a month ago, but after getting pissed of waiting i decided to buy another 2Gb ram, and replaced it instead of one of the 512-ram (bad move i guess) and at the beggining it seems to work fast and well (computer properties showed me 2.5gb ram).
after an hour of using it stuck, when i restart the computer, while noticing that on the startup it says 'single channel-64 bit' (and not 128, i guess). .. and stuck again..
i tried working only with the 2gb card, or back only with the 2X512 - nothing helps.

is there any solution besides reinstall win 7 with the 2GB card?
does another 2BG card for faster duel channel will be helpful(with my slow processor..)?

waiting for salvation..

A:dual channel to single channel

Usually, to get dual channel, you have to install RAM in pairs of the same size.

If you are using multiple pairs, the pairs don't have to be the same size. (Example: two 1GB DIMMs, plus two 2GB ones, would support dual channel, although they'd have to be in the correct slots.)

I belive that some motherboards can use dual channel mode with 3 DIMMs, but it's not obvious how that works.

My Intel X58 motherboard claims to be able to do triple channel with 4 DIMMs in the right slots, but I've never tried it.
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thanks in advance this has been bugging me for quite some time!

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A:Single Channel vs Dual Channel Ram

check out this article....

First of all does your mobo support dual channel? AMD socket 754 do not support dual channel. I have a 754

Here is an article that answers all of your questions...

Keep in mind that in order to perform in dual channel you need to sticks of the exact type of memory - "matched pairs" (same speed and latency).
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(I know that the old pair will probably jump down to 533 also.)

Also, do you think it would be worth it for $100? Is there a noticeable difference?

Thanks for the help.

A:Mixing Dual Channel Pair and Single Channel Pair Memory question

need more specs

does your mobo have 4 ram slots if so use the 1st and 3rd that should run it in dual channel !!

also make sure you on have 2 sticks in not 3 :slurp:

and the answer is to your question what ever the lowest speed ram is. the other ram will be clocked down to run at that same speed the lowest speed
takes the rains !!!
and you will notice the difference running dual chanel

but for reall speed difference ditch your ram and buy GEIL ULTRA
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So I'm working on a PC rebuild for work. Specifically the computer used to go graphic design for signs, which is rather Memory intensive (4ft x 8ft raster graphics take up a lot of space to load into Photoshop.....)

But what I'm wondering is Tri-Channel memory really worth the additional cost of the RAM and Mobo??

Or should I just stick with dual channel?

A:Dual channel vs tri-channel

Hey Tortured,
to the public at large Intels Tri channel memory bandwidth goes unused as not a whole lot takes advantage of it, and most users would not realize a tangible difference. Doing graphic design is one of the exceptions though, and you would probably see a substantial gain from it.
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A:SATA II HDD - Does IDE Channel Master/Slave matter?


Welcome to Seven Forums.
Although it may appear dated, have a look at this article - How To Install and Troubleshoot Serial ATA (SATA) Hard Drives
Also have a look at this tutorial (credits to Seagate)

Hope this answers your query in some way

Take care and regards
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thank you

A:8GB DDR3 (dual-channel) x 6GB DDR3 (triple-channel) Which is better?

Depends a lot on how much RAM your applications need. Triple channel is slightly faster, but if you. Err. Run two instances of Crysis, then you might need 8 GiB so the other solution is 'better'.
My vote goes for 3x2...
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Is there any way to be able to send the 2ch audio to the surround speakers using the SupremeFX card cabled directly to my receiver?

Thanks for any input.

A:Faking a 5 channel signal with 2 channel audio?

Dolby Pro logic supposedly responds to the directionality of a signal, and that's how it synthesizes(or perhaps extracts) the 5 channel info. Well that's great, but I have found that it sounds like s*** on a 2 channel music source, So, I just use the surround modes and allow myself to be entertained with rear channel surround. If the front channel speakers are imaging correctly, there is no need whatsoever for a center channel with music.

Plan "B" is obviously a brand new receiver with discreet 5 or 7 channel inputs. And that pins you to 1 specific listening position, or the effect is lost.
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Hi all,

I was looking at this set of RAM:

This is on a shell shocker deal and is currently cheaper than buying a set of the same ram in a 12GB set. I was wondering if I bought this set would I be able to use it in my motherboard which supports triple channel? Say, could I remove one stick and use the other 3?

Thank you!

A:Quad channel RAM in triple channel mobo?

The short answer is yes. There is no such thing as quad channel ram, or triple or double for that matter. Ram is ram and you run it in single, dual,triple mode that is determined by the memory controller and the motherboard architecture. ram kits are bundled as "dual channel, or "triple channel" meaning that they are ostensibly tested and certified to work together in tandem. usually it means that they were manufactured in the same lot and taken from the line in succession. You can use a portion of a triple channel kit for your dual channel setup, or parts of two dual channel if you like. The only caveat to this is tat the 4 GB modules seem to get a little more finicky than do the 2 GB mods. In all likelihood they will work just fine. But you might want to consider shelling out the extra for a certified set.
hope that helped.
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How do I fix this?

Is it best to just disable the controllers for the ports I'm not using in the BIOS? All 8 ports are enabled even though I only use 5 of them, I assume the errors would be for unused ports.


A:ATA Channel 0, ATA Channel 1: This device cannot start. (Code 10)

After checking the manual I can't disable SATA ports 7 & 8 because they use the same controller as the IDE ports and my DVD-RW is still IDE (it must have burnt 5000 CDs, and one CD even came out with parts of the drive on it years ago, and it still works).
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How can I tell if it is supported by my mobo?


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first off, what is Cas latency and will this ram work in this mother board?

ram -

mobo -

oh yea, and i installed a windows update, would that have killed my on board lan port? it died right after i installed a windows update. i think i tried dl'ing an update from the mobo website but i don't remember what happened.

A:dual channel ram

Thats fine ram but that board will not support dual channel you need a 939 socket for that like this one..

or this one

I hope you have not bought the CPU yet or are you using a existing one??
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Question is; what's the best ram? I'd be looking for a gig, and also so that i can do dual-channel whatchdomagigga. Probably around the 100 mark, prepared to spend a bit more....say 120.

[edit] Perhaps this? (Kingston HyperX 1GB 400MHz DDR Non-ECC CL2 (2-3-2-6-1) DIMM (Kit 2) - 120)
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A:Dual channel DDR

Far as I know it is the chipset that changes, the memory is basically the same
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A:to Dual Channel or Not to Dual Channel

Hello and welcome to Techspot.

IMHO I would go the dual channel route, and ditch the 256mb stick.

Regards Howard :wave: :wave:
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At the moment the installed ram is:
DIMM3: Kingston 512 MB DDR2-667 DDR2 SDRAM
DIMM4: Kingston 512 MB DDR2-667 DDR2 SDRAM

I have 2 free memory slots and I would like to increase the RAM by installing another 2 x 1GB kingston DDR2-667 without removing the 2 x 512 already installed. Is this a good solution? Will I still get dual channel performance with these 4 memories?

I'm usuing Microsoft Windows XP Professional 32bit and I've read that there's no point in installing more than 3GB. I'm not an expert and that's why I'm here seeking expert advice. What would be the best solution to get the max Ram possible on this PC?


A:Dual channel help please

hello al19, i think the usual config for using the dual system is to use slots #1 and #3 for identical memory such as 1 Gb and the other slots #2 and #4 for both 512gb memory ram.

But just to be sure, you can consult the motherboard catalog for further information.
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Dual chanel DDR


I have a gig of DDR 400 on a single chanell MOBO (SiS648)

If I buy a new MOBO with support for Dual channel DDR, then will I need to buy more sticks of RAM? Like does the RAM itself need to support Dual channell?
I have 2 512MB Kingston DIMM'S

Will the performance increase be huge or a little?

A:Dual channel DDR

I think they have to be DDR 400 ram.
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i had 2 x2gb sticks before and they ran fine in dual channel. so I'm trying to figure out whats going on. here's links to the specs


btw, i'm running 64-bit vista ultimate

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Hi, What is Dual Channel Ram? When they dual channel 1GB, is it basically combining 2X512mb DDR? Or is dual channel actaully something else, like faster?
Any help would be aprrecieated

A:What is Dual Channel ram?

Dual channel means that your motherboard can read from two memory sticks at the same time, thereby effectively doubling the memory bandwith.

Ideally, the two memory sticks should be as closely matched as possible. Some memory makers sell matched pairs of memory sticks and call it dual channel RAM. The memory itself is just regular old SDRAM. As you stated, 1 GB of dual channel RAM would consist of two 512 MB sticks.

Note that buying dual channel RAM does not give you dual channel performance if your MB is not so equipped.

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can anyone hook me up with some comparisons between dual and single channel ram?

i keep hearing 1 gb of dual is better than 1.5 gb single...i would like to know a general conversion factor between the two

thanks in advance

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A:dual channel

CPU-Z will tell you. Download it HERE
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Could someone explain what Dual Channel DDR is and how much faster is a computer with dual channel RAM to one with standard RAM?

A:Dual Channel DDR

I'm guessing you know how RAM works, Dual Channel, is far better than Single channel mode mainly because it effectively doubles the memory bandwidth you have.


Assuming you know :-

266MHz = PC2100 or 2.1GB/s Peak theoretical Bandwidth
333MHz = PC2700 or 2.7GB/s Peak theoretical Bandwidth
400MHz = PC3200 or 3.2GB/s Peak theoretical Bandwidth

Armed with that knowledge, because Dual channel effectively has 2 channels, it DOUBLES the read/write etc..

so, say you have 1x512MB PC3200 Dimm you can achieve 3.2GB/s, but if you have 2x512MB PC3200 in dual channel mode (requires a capable mobo) you can effectively get 6.4GB/s.

Hope that helps
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A:Dual Channel RAM

Download Memtest86+ and make a bootable USB stick with it, reboot and go into the BIOS and force it to boot from the USB stick. Let Memtest run for at least a few hours or until it throws errors(if it does). If there is a RAM problem, Memtest will find it more than likely.

Here is a tutorial that will walk you through this process. How to Test and Diagnose RAM Issues with Memtest86+
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make sense?

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I was quite disturbed to find that after buying my amd64 3400+ on a 747 mb my friend told me this would not support the dual channel memory feature.Is this true?!

Thanks for the help.


A:Skt 747 has dual channel??? Help!

Socket-754 CPUs have a single channel memory controller.
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Hello everyone. I recently ordered a mushkin "2GB 240-Pin DDR2 SDRAM 800 (PC2 6400)". I was wondering which config would be better 3gb running in Dual-channel at 667mhz since thats the current ram i have on the system thats what I'd have to set the new one too, rite?. Or removing the 1gb that runs at 667mhz and just using the new 2gb at 800mhz. I dont really know exactly what Im talking about so feel free to let me know anything if i was incorrect. But from what i read on wikipedia it said a bottleneck effect would happen if the processors FSB was greater than the memorys speed, so that's why I want to know which would be better.

System specs

[email protected]/[email protected](E4500)
1gb RAM at 667mhz
320g hd
XP home

A:Dual-Channel or...

If the Ram is rated at 667mhz, then that's all it'll ever do

I say go for the 3 x 1gb RAM at 667mhz (if you have 3 exactly the same)
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They're made by Elixir, and the label on the sticks read:

512MB DDR-400 MHz-CL3

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I currently have:
2 x 256mbs of ram in slots 1 and 3
1 x 512mbs of ram in slot 2

I used a program called CPUZ to determine whether they were running in dual channel and it said they were, they seem to be working fine as I have no probs running games such as NFSMW and BF2 (other than a bit of lag I put down to my graphics card). Could this configuration cause probs??

I know that it is best to have same size ram and same make, blah blah blah, but best I can do at mo, any suggestions.

A:Dual channel ram

To the best of my limited knowledge when running ram in dual channel mode you need two identical sticks of ram ie a matched pair placed in the same colour ram slots.

As for selling ram as "dual channel" ram it must mean a matched pair of identical sticks I would imagine.
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Hi there.

In my machine at the moment, I have a bit of a mishmash of RAM, (A 512MB PC2100 stick, a 256MB PC2100 stick and a 256MB PC3200 stick) and I decided I needed a RAM boost. I plonked out and got a PC3200 Dual Channel kit (totalling 1gig).

Now the question is, what is the best config here? I have a few in mind:

Dual Channel totalling 1 gig (2x 512MB PC3200)
Single Channel totalling 1.25 gig (2x 512MB PC3200 + 1x 256MB PC3200)
Single Channel totalling 1.75 gig (2x 512MB PC3200 + 1x 256MB PC3200 + 1x 512MB PC2100)

Which of these is the best. The rig itself is mainly for gaming with an occasional penchant for Photoshop and Flash.

Any opinions greatly appreciated!

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Will dual channel ram work none the less.?

A:dual channel ram

dual channel ram just works with two sticks of the same type of ram.

i have dual channel in my mb and i just bought two of the same stick and that works - if you mean to ask whether a pack of two of something would work, it will. not sure if there is a ram that will only work for dual channel.

just make sure everything else is compatable as far as what kind of ram it is (pc3200, 400mhz...etc.)
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A:Dual-Channel DDR

Of course you can use only one. You won't be in dual channel mode but it will work.
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I have 2 sticks of RAM. Different size, same vendor.

Corsair 4 GB PC10700 667 Mhz
Corsair 2 GB PC10700 667 Mhz

Installed on Windows 8.1 laptop. Windows sees 6 GB RAM.

I opened CPU-Z and it says Channel = Dual

Does this mean Dual Channel mode enabled at the moment?

A:Dual Channel RAM

If I remember correctly 2GB of each channel will be Dual and the remaining 2GB will be single channel.

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Thanks in advance.

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A:dual channel

no i'm keeping my pc2700 i just wanted to know because i might be getting a prescott (depends if it's better than the 64) and i've heard that the dual channel on the p4 is great so i think it'll be tha same with the prescott
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I assumed the ram was just single channel ram so I bought this

I put it in the 1st and 3rd slot and it booted fine, I checked the cpu-z, still single channel! So I went into bios and changed the DCT mode from unganged to ganged and it is still running in single channel. Someone please help me

Board: GA-MA790X-UD4P
Proc: AMD Athlon II X2 240 Processor ~2.8GHZ
GPU: Nvidia GTX 260
Ram: the link

I appreciate your time reading this!

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I may want to up the memory on my machine from 1 GB to 2 GB which is the mainboard's maximum. It is an MS-7211 from MSI. Here is the only thing the manual says about memory:

Main Memory
? Supports two memory banks using two 184-pin DDR DIMM.
? Supports up to 2GB PC3200 (DDR400) SDRAMs.
? Supports 2.5v DDR SDRAM.

I want to get dual channel ram. Can anyone tell me if they know it is guaranteed to work? Or do you need a special motherboard for dual channel?
Facts definitely welcomed and so are educated guesses too. Thanks.

A:Dual channel RAM or not?

Quote: Originally Posted by torrentg

I may want to up the memory on my machine from 1 GB to 2 GB which is the mainboard's maximum. It is an MS-7211 from MSI. Here is the only thing the manual says about memory:

Main Memory
? Supports two memory banks using two 184-pin DDR DIMM.
? Supports up to 2GB PC3200 (DDR400) SDRAMs.
? Supports 2.5v DDR SDRAM.

I want to get dual channel ram. Can anyone tell me if they know it is guaranteed to work? Or do you need a special motherboard for dual channel?
Facts definitely welcomed and so are educated guesses too. Thanks.

Hi torrentg......

as long as your RAM sticks timings & sizes match, you'll be running ''dual channel'', the BIOS will deal with it automatically.....all motherboards that run DDR, run ''Dual channel'' (where applicable)

so ideally you want a 2gb kit (2x1gb), but its not essential.
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My Friend has a AthlonXP Channel Dual RAM barton and a Soltek mobo that supports Dual Channel RAM Hes got two MB sticks of RAM in there both DDR the mobo supports upto DDR RAM How can we tell if his mobo pc has gone into Dual Channel mode Couldnt find anything in the BIOS and theres dimms for RAM Slot and Slot are Yellow and Black But slot is also yellow So I thought DC mode I d put the RAM in slot and or both of the yellow slots So I tryed both having the RAM in slot then benchmarked Then left stick in slot one of the yellow colored slots and Dual Channel RAM took the other stick out of slot the black slot and put it in slot the other yellow colored matching slot After benchmarking both the results were identicle So it isnt in DC mode btw the brands are diffrent One is Kingston other is another brand I forget not Crutial tho blush nbsp

A:Dual Channel RAM

Well Ash, to have RAM run in dual-channel mode you should (you don't have to, put should) have paired RAM (like this Corsair) so they are guaranteed to work together in DC mode. If I may quote a paragraph :

What are some of the benefits of using paired memory? Since the memory sticks are packaged together after they have been tested together makes sure the modules that the end-user receives will be stable and perform well. Mixing different memory could lead to system instabilities or the memory modules might not run together due to compatibility issues. This takes the guesswork out of choosing memory for a dual channel motherboard. In addition, we feel that since memory speeds are not getting much faster, this give memory manufacturers another stepping-stone before moving to faster memory. Recently many other manufacturers have also started producing these paired memory kits.Click to expand...
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Hey everyone,

I just recently scored myself a new motherboard in anticipation of installing a new 800FSB P4.

I'm looking into the pricing of running Dual Channel 512mg sticks of PC3200 ram...

I've noted that the price differences hover about 35-40% more between the 2. (being the dual channel supported DDR memory versus the plain jane PC3200)

Now my question is... is it really that much faster to justify the significant additional dent its going to make in my wallet?

Would a dual channel setup of 256x2 (512mg) hold its own against 512x2 (1gig) of its non-dual channel counterpart...

They are about the same price...

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Maybe a simple answer but the fact that I dont know what the answer is means I have to ask. I have 2x512 running a 939 socket single core AMD 3800+ @ 2.7GHz. Installed RAM is DDR400/2x512 running in dual channel. Ive come across a stick of DDR333/512 and I would like to use it but I need to know if Im going backwards in terms of performance. As you can see my overclock is not great at all so I dont consider it a concern to revert back to stock frequency (2.4GHz) as long as Im gaining performance with more RAM. Theres no need to get specific if you dont have the time but a general rule of thumb would suffice.


A:Dual Channel vs More RAM

Unless i'm mistaken ,if the stick of ram is the same spec, then on certain boards it will still use your existing ram in dual channel mode, but with the extra stick added as well in probably single channel.

This will need clarification, but i'm sure i've read or heard it somewhere.
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Well, after inspecting the EpoX 8rda+ mainboard pamphlet, I am thuroughly confused about dual channel DDR.

I have 1 stick of 512MB 2700ddr crucial non-ecc unbuffered and 1 stick of 256MB 2700ddr crucial non-ecc unbuffered.

I understand the slot arrangement to allow for dual-channeling, and thus my question is : Do the ram sticks need to be the same size for dual channel to be a) working b) optimal

Thx for your help


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Im jus wondering what the gain in performance would be,or if thare is any. Like if i have two 256meg sticks in dual mode or one 512meg stick in regular mode.
Is dual channel better? if so why?
keeping in mind more than 512meg would be overkill in my use of my PC.
Just wondering
thanks all

A:Why Dual Channel?

Running your memory in DualChannel mode on a K7 platform will account at most in a 3-5% performance increase & only in memory intensive tasks.

If you can get that little extra performance for free, go for it. If you have to shell out some more money for it, it is not worth it.

The DualChannel memory controller on the nForce 2 platform was concieved to help keep all the integrated devices (VGA, Ethernet, SOund, IDE, etc.) fed with data without having to tax the memory bandwidth allocated to the CPU.
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Hi Guys,

I have a new p.c. and currently have a total of 1536mb of pc3200 (ddr400) crucial technology Ram. They are currently situated as follows,

Slot 1 512mb
Slot 2 512mb
Slot 3 256mb
Slot 4 256mb

Is this the correct set up for dual channel?
Would it be better if i had a different configuration like,

Slot 1 512mb
Slot 2 256mb
Slot 3 512mb
Slot 4 256mb

Many thanks in advance.

1536 MB PC3200 (DDR400)

A:Dual Channel. Please help...(i'm new to this)

Take my advice with a grain of salt as they say, until someone who knows more corrects me... I thought that in order to have dual channel memory all the chips had to be the same size and type. I would look through your motherboard owners manual and see if it mentions memory configurations in it anywhere. I would also look at the boot up screen and see if there is a message about what mode the memory is currently operating in. Some motherboards report this information at POST.
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just a quick one, say :-

someone has a board that'll support Dual Channel DDR, but doesnt have the money or can't find the stuff for now, will normal DDR SDRAM work on it ? albeit slow :]

A:Dual Channel DDR

also, if anyone does read this, can someone paste the diff between asynchronous and synchronous ram types :]

cheers fellas
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Ok, so my motherboard died. I want to buy a new board, and CPU. Now I have 3 chips of DDR ram, 2(256mb), 1(128mb), all at 266mhz. The motherboard i have been looking at has a nividia nforce 400 ultra chipset, and 3 sockets for DDR Dual-channel ram. Now if i install the 3 cards of ram i have wouldnt it just read it has single channel, not dual, but it would still work and read 640mb ram right? The reason i ask this is b/c i have been told that NON-dual channel ram, will not work in a dual channel motherboard. Need some help here guys, thx...

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I was wondering if someone could please explain to me what Dual Channel DDR is. Is this a certain type of ram to be used with a compatible motherboard, or is this a motherboard feature designed specifically for the new PC3200 ram?
Would this feature work with the PC2700 ram?

A:Dual Channel DDR

Dual channel DDR is exactly what it sounds like. To put it simply, the chipset accesses two sticks (or channels) of DDR at the same time instead of just one. This gives a decent performance boost, but the drawback is that it requires two physical sticks of ram.

Here's a roadmap of upcoming dual-channel core logic from various companies:

Nvidia Nforce2.
Final silicon is shipping to motherboard makers. Expect first retail motherboards in the sales channel in October. It's available only for the Athlon XP processor, and will support two DDR400 channels, though Nvidia suggests that best performance will be when the memory is clocked at the same speed as the Athlon XP FSB.

VIA P4X600.
This is a dual-channel DDR chipset for the Pentium 4. It will support up to DDR333 and AGP 8X.

Intel 7205.
This is the chipset formerly known as "Granite Bay". It's aimed at the low-end workstation market, but we should see some performance motherboards in the channel by the end of the year. Note that Granite Bay is limited to DDR266, but supports AGP 8X

SiS 655.
This is SiS' entry into the dual-channel DDR chipset race. It's expected to support DDR333 as well as AGP 8X.
Springdale. This is Intel's mainstream dual-channel DDR chipset, but it won't be out until late Spring of 2003 at the earliest. It will support dual-channel DDR333 and possibly ship with a new I/O controller hub. It will also likely support a frontside bus speed of 667MHz (333MHz actual clock).

VIA P4X800.
Little is known about the P4X800, except that it was supposed to support two DDR400 channels. Given VIA's recent retreat from full DDR400 support, it's uncertain what the P4X800 will bring to the table.

Dual-channel DDR has the potential to have memory bandwidth that equals or exceeds that of the RDRAM-based Intel 850E, but only shipping products and in-depth testing can verify that. Note that even the low-end dual-channel DDR266 memory is capable of moving data at a theoretical maximum of 4 .2GB/sec -- equal to PC1066. Whether DDR266 is as efficient as RDRAM is open to question, however.

On the other hand, dual-channel DDR-333 has the potential to move up to 5.4GB/sec, something that even RDRAM can't match. We'll have to see if the chipsets can actually support throughput that high. Another issue is whether the CPU can handle the higher bandwidth. The current Pentium 4 is capable of absorbing 4.2GB/sec with its 533MHz (effective data rate) 64-bit wide front-side bus. AMD's current mainstream CPU currently weighs in with only a 266MHz frontside bus, though the company will probably move to a 333MHz frontside bus fairly soon.
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I have 1GB Dual Channel right now, and I have another 1GB laying around, non Dual Channel, should I go non dual channel so I can have the 2GB or is 1GB dual channel better? Thanks.

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i notice a LOT of laptops have 3Gb (2Gb + 1Gb) - does dual channel still work under that? - if not WHY do they bother? - they should stick with 1Gb,2Gb or 4Gb rather than decrease the performance to get 3Gb in


A:dual-channel with 2+1Gb..?

Here is some good reading about dual channel.

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heya sorry for making a new threat i tried to read previous posts but around after an hour or so i didnt find 100% my answer. so what i want to ask is

I am allready using on dual channel setup 2x Kingston's KVR400X64C25 512MB pc300 400mhz.

Now i found 2 pieces of Kingston KVR400X64C3A 512MB PC3200 400mhz on really cheap price.

if i purchace them and use them on my 2 free Dual Channel Slots on my mobo they will work fine right? i mean they wont mess the dual channel on my 25's and they will all work toggether on dual channel mode x2 ?

A:Dual Channel ram

"I am already using on dual channel setup 2x Kingston's KVR400X64C25 512MB pc300 400mhz."

I'm guessing that you missed the 2 out above in the red area. If you have then i checked both types of RAM card are the same and will be compatible.

Having checked them both they are both DDR so i don't see why you thought there was a problem
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please help... im upgrading my pc to windows 7 my hp died a death a few weeks ago bit had it for 5 years so cant be bad really... but not really clued up on specificaation thingys..

saw this computer that i want in my budget with all the software thaat I need..

Dell Inspiron 560 mt desktop.

intel celeron 450 processor (2.2ghz, 800mhz 512 cache)
2 gb dual channel ddr3 (2x1024) memory
360 sata hdd.
integrated intle graphics media accelerator gma x4500.
7.1 channel 7 home premuim microsort office
intergrated gigabit nic....

does dual channel mean its a dual core??? and what is ddr3....thanks in advance


A:what does dual channel ddr3 mean.

No, doesn't have anything to do with the processor. It improves memory bandwidth, see here:

DDR3 is the type of RAM:

Celeron is the worse processor you can get.

That's a pretty low-end computer all around.
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HI, My m.Board supports dual channel DDR, but the manual is a bit vague...

I understand that a complimentary card in channel B will double the bandwidth, but will this also double the RAM? or is this only if both are in channel A.

The way I picture it - and I may be way off - is the 2 slots of channel A, or B are connected in serial, whereas the channels THEMSELVES are parallel.

I hope that I explained that clearly???!!!???

Thanks in advance, STEVE.

" A little knowledge is a dangerous thing "
SOMEONE Famous???

A:Dual Channel DDR? GA-7N-400_L

Using 2 x 512mb sticks of ram in dual channel mode will increase the bandwidth but also still give you 1024mb of system ram.

I often explain that dual channel ram operation is a similar concept to RAID-0 with hard disks.

I found this explanation over at PCStats forum

Dual channel memory works just like RAID on a HDD. Basically the two memory controllers stripe the data accross/between both sticks of RAM to allow faster access. Functionally in single channel memory the one memory controller just assigns address to the RAM and realistaically sees one 'chunk' of RAM being the sum of all the sticks. In dual channel each controller address its stick of RAM independently and allows each stick to be access simultaniously.Click to expand...

Hope this explains things
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i have a total of 5gb of 5300 memeory in 4 slots,it shows in windows as 5gb but only as single channel.
is it better to be dual channel memory and how do i go about making it so.

A:dual channel memory

Dual channel is better, you need matched sticks to do it, if it's in single channel mode then at least 1 pair of the ram is not matched.
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I just installed 2GB of ram to bring me to 4GB total but, WINXP doesn't recognize it. This might be a mother board problem but there's some weird stuff about the mother board configuration that makes me think otherwise so, I posted it here.

Here's my PC stats:

I enable /PAE in my boot.ini file and nothing changed. In my setup menu in my mother board's BIOS, it shows all 4 DIMM slots occupied with 1024m each give me 4096m in dual channel but when the computer boots up and does a memory check, it only shows 3072m. I have the lastest updated BIOS too so... I not sure what I can do... CPU-Z and NERO info tool report I have 4GB but, WINXP doesn't...

A:Can only see 3GB out of a 4GB Dual Channel config.

This will explain it.