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Combining different ram?

post #1 of 6
Thread Starter 
I bought this set of ram sometime back G.SKILL ECO and I wanted to upgrade to 8gb, but noticed it's deactivated. So here is the newer model of it G.SKILL, the timings are different on the second model..would it be okay to put them together? Thanks.
post #2 of 6
I'd suggest not to mix RAM with different timings, might cause stability issues. If you can tune both sets of RAM to run at the same speed with the same timing, it MIGHT be okay. But still I'd suggest using similar sticks.
Edited by strych9 - 2/23/12 at 9:48am
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post #3 of 6
Yes, it's okay.

If your start overclocking your memory or adjusting your timing you can run into trouble.

Just understand about your motherboard in "dual channel mode". Sticks with one set of timing go into one channel, and sticks with another set of timings go into another channel. Your motherboard manual does a good job at explaining it. Put one "set" of RAM in the first and third slot. Put another "set" in the second and fourth slot. Your motherboard should automatically handle it from there.

EDIT

They need to be the same speed (or both sticks will run at the slower of the two speeds).

I think strych9 advise is wrong. Setting both sticks to the same timings will actually cause instability. (I think) Your motherboard's memory controller can handle different sticks running at different timing as long as you do the dual channel thing correctly.

Hopefully someone can either prove stych9 right, or prove me right.
Edited by crimsontears809739 - 2/23/12 at 9:49am
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post #4 of 6
You'll be fine. They'll just run at the slowest RAM's speed of the two.
post #5 of 6
Thread Starter 
Thanks all. Going to order.
post #6 of 6
It seems Strych9 is correct about latency. My assumption was wrong.

Turn to your motherboard manual to Section 2.4.2,...bullet number 5 (page 2-11)

" ALWAYS installs DIMM's with the same CAS latency"

I would assume it would try to drive both modules at the same CAS latency, which could effect stability.

Correct setup for dual channel mode is explained in Section 2.4.1, (page 2-10).

sorry.
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