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Does RAM have to be matched pair for dual channel?

Last response: in Memory
September 15, 2011 8:35:41 PM

Hello there,

I have a set of 2x4gb sticks of ram and 1 separate stick of the same. Here are the links:

If I buy another single stick, will they all run at dual channel?

Thanks in advance!
a b } Memory
September 15, 2011 8:37:23 PM

They *should* run in dual channel, but it is impossible to say and they may or may not work properly.

You should always get matched pairs, since they are pre-tested to run Dual channel

But, all else aside, you should be able to buy another chip and have it run properly. As long as it is the saem chip
a b } Memory
September 15, 2011 9:53:38 PM

In actuality you should buy ONE, matched, tested RAM kit to insure proper operation. Anything less than ONE, matched, tested RAM Kit is not guaranteed to function properly and often will not. That means even if you use 2-3-4 identical model/part number DIMMs they still may not function together without issues or at all - especially with DDR3 RAM which has higher frequencies than DDR2/DDR RAM.

That being said some folks take a chance and get mis-matched RAM to work. With the current low prices of RAM I recommend buying ONE matched, tested RAM Kit of the total quantity you desire. You will not get any significant increase in performance over your existing set-up by adding one DIMM anyway.