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3gb RAM on dual channel?

post #1 of 10
Thread Starter 
The topic is ridiculous i know .. But the real question :
Can i make 3gb RAM to be like 2gb RAM on dual channel and 1gb ram on single channel?
I did it on my mobo , 2gb is on dual and 1gb on single , but it says its only on single?
Thanks for reply's!
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post #2 of 10
An odd number of memory modules, cannot work in dual channel mode.
post #3 of 10
The only way I know of to use 3gb dual channel is with a 2x1gb kit and a 2x512mb kit.
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post #4 of 10
I think that would work. As long as there is an even number of sticks.
post #5 of 10
Thread Starter 
Ohh .. Well yeah i was thinking of that too.. But i thought this might work..
Well thanks for your quick replies guys! I'll use 2gb instead then
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post #6 of 10
I had 2x1GB and 512MBx2 sticks running dual channel. it's alright
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post #7 of 10
I think 3gb non-dual channel will be more beneficial than 2gb dual channel. (As long as they are the same speed)
post #8 of 10
I'm running 3GB, and to be honest, I can't tell the difference between 2GB dual channel and 3GB non-dual. Only thing is, that I have more memory at my disposal.
post #9 of 10
Thread Starter 
Hmm really? I'll stick to 3gb then!
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post #10 of 10
I too have heard that the performance increase of dual channel is less than 5% compared to a single channel setup like you have (3 1GB sticks). So running 3GB in single channel shouldn't be a big deal. However, this assumes that your extra 1GB stick can run at the same speeds and timings as the 2x1GB set. Whether you have 2, 3 or 4 sticks of memory, it all MUST run at the same speeds and timings. So if you took a 2x1GB set of DDR2 800 4-4-4-12 and paired it with a 1GB stick of DDR2 667 5-5-5-15, then all three sticks will run at DDR2 667 5-5-5-15, which would be a big hit to your performance. Another important note is that all memory MUST run at the same voltage. So pairing a 2x1GB set of say Crucial Ballistix that wants 2.2v with a 1GB stick of G.Skill that wants 1.8v could result in disaster, either burning up the G.Skill at 2.2v or severly undervolting the Ballistix at 1.8v, resulting in poor overclocking.

So assuming all your memory is rated for the same speeds, timings, and voltage, then you're only going to take a small hit in performance. However, if you don't need 3GB of memory then you're taking an unnecessary loss of performance, small though it may be. I'm willing to bet you don't use more than 2GB of memory, however if you run Vista and some of the brand new video games, you're likely to use more than 2GB so going with 3GB is the better option.

In short, sticking with 3GB should be fine, but dropping down to 2x1GB should be equally fine haha.
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White Whale
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