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Need Some Urgent Help Guys!


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Okay, I just purchased a new PC, and ordered three sticks of Corsair -Dominator RAM. The RAM sticks were all the same, CMD4GX3M2A1600C9, a matched set. One of the sticks was bad, so I had the company send me a replacement stick. The RAM stick they sent me as a replacement was TW3X4G1600C9D. The timings printed on the label are the same as on the other sticks (9-9-9-24), and the speed printed on the label is 1600mhz like the others. So, I installed it, ran MemTest for an hour or so, and no problems.


However, when I run CPU-Z, I am getting some weird numbers back from the SPD tab. The two original sticks of RAM are running at 667mhz, the new stick is running at 533mhz. Other differences are the tRAS and tRC timings. So, here are my questions....


1) Is the new stick of RAM actually running at only 533mhz?


2) Is my RAM no longer running optimally since it's no longer "paired"?


3) How much RAM do I actually have? The label on each stick says "4GB(2X2GB) 2048MB". Uhh....2048MB is not 4GB. Am I missing something??


4) Should I return the newer stick and buy another stick of CMD4GX3M2A1600C9 from Newegg to keep them all matched and paired?


Thanks for ANY information you guys can provide. I never knew RAM could be so confusing. Arrrgh!

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Please fill out your profile specs (link on the left). Your post is contradicting itself and your PC specs will help to clarify things.


CMD4GX3M2A1600C9 is a 2 stick KIT, not one stick, not a three stick kit. Did you get a 3 stick kit, or a 2 stick kit?



1. Ignore the SPD TAB. Look at the MEMORY TAB. That's what your memory is actually running at.


2. Did you replace BOTH sticks, or only one?


3. 2 GB PER STICK. 4 GB together. Check in CPU-Z / Windows / BIOS / Boot to confirm.


4. It is NEVER RECOMMENDED to mix kits. Two separate kits named CMD4GX3M2A1600C9 ARE NOT guaranteed to work together.

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Thanks for the reply. I only replaced one stick because it was defective when they sent me the PC.


I just removed the new stick (TW3X4G1600C9D) and looked in the MEMORY tab of CPU-Z, and the RAM is running at 534.5mhz.


I will just buy two sticks of CMD4GX3M2A1600C9 from Newegg. It's $106 for both sticks, and even though it's not guaranteed they will pair, it's going to be better than an obviously different stick.


In your opinion, is that the best course of action for me to take?

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Without all of the requested info (specs, # of sticks in the kit confirmed), I can't suggest a best course of action, but either way the company should have replaced all of the memory at the same time to ensure compatibility. Personally I'd go back to them and ask for what you paid for, a matching kit of memory, not unmatched sticks of memory.
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