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Mixing 2x512 and 2x1gb?

E

enwar3

Golden Member
So I'm upgrading an old rig and put another 2x1gb DDR400 in next to a set of 2x512gb. Same ram, and it should have the same timings (OCZ Platinum), but will having all four slots filled, and with different ram, require loosening timings or anything?
 
Hmm, wonder if Dual Channel works that way. Perhaps if you put 1 Stick of 1GB and 512MB each on one channel, and the other 2 on the 2nd channel.

Regarding timings, it's not really required to loosen it if the RAMs turn out able to cope with your timings. Best is to try your current timings and test it with memtest. If they were of the same brand, perhaps you'll get better compatibility.
 
you'll probably have to set your rate to 2T instead of 1T. otherwise there wasnt any problems for my amd opteron rig. my overclock stayed the same (250FSB, 1:1), cpu/mem/video card voltage stayed the same, and all is well.
 
Put the matching modules in the proper slots. Usually slots 1 & 3 are paired, and slots 2 & 4 are paired. They'll function fine, as well as work in dual-channel mode (as if it makes any difference).
 
There shouldn't be a problem, but as ShadowFlare said, testing with Memtest is a good idea. If you see errors, then you may have to tweak some timings/voltages.
 
Originally posted by: ShadowFlareX
Hmm, wonder if Dual Channel works that way. Perhaps if you put 1 Stick of 1GB and 512MB each on one channel, and the other 2 on the 2nd channel.
Click to expand...

This is the correct way to do it, with newer AMD processors (Socket 939 or newer).

Originally posted by: RebateMonger
Put the matching modules in the proper slots. Usually slots 1 & 3 are paired, and slots 2 & 4 are paired. They'll function fine, as well as work in dual-channel mode
Click to expand...

And this is the correct way to do it, with an Intel processor, as long as the motherboard is new enough. With the older Intel chipsets (before 915 chipset), you have to use mis-matched sticks the same way as the newer AMD processors.
 
I have a s939 chipset... but I thought I put matching ram in pairs 1&3 and 2&4. Are you saying that's wrong?
 
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