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Impact of memory frequency/CAS latency on gaming performance

post #1 of 5
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I plan to upgrade my aging system to Haswell when it's released (June I believe ?). I've been reading up a bit on the impact of memory performance when gaming (on Sandy and Ivy, it may differ with Haswell I'm not sure) and the consensus seems to be that for the most part memory frequency/latency isn't really a big deal.

Does anyone have an opinion about the best frequency/CAS latency combo ? Does it really even matter to pay a little more for a small boost in performance ?
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post #2 of 5
I actually had some folks at Corsair tell me latency has to little of an impact to matter. As for frequencies, it seems AMD's design takes advantage of it more than Intel. With Ivybridge anything past 1600 seems to have very little impact.
post #3 of 5
You won't really notice a difference past 1600mhz. You'd be best getting a set that'll do 1600mhz at CAS 7. My experience with Sandy and Ivy Bridges is that they don't like anything less than CAS 7.. I'm not the best memory overclocker though rolleyes.gif
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post #4 of 5
All the tests I've seen basically say that latency (CAS rating) doesn't matter much at all, and that frequency only matters a little. If you get some decent DDR3-1866 you'll be set for now and the likely future. I'd say get 1600, but the price difference to 1866 is pretty insignificant so I'd hedge your bets with the slightly faster stuff.
Quote:
Thus, memory timings have indeed become a rather insignificant parameter for today’s computers. When choosing DDR3 SDRAM for an Ivy Bridge processor, you should consider its clock rate in the first place whereas a low CAS Latency and other timings are in fact unimportant. The same goes for tweaking and overclocking: you should first focus on increasing the clock rate of your DDR3 SDRAM and only then minimize its latencies if you want to.

http://www.xbitlabs.com/articles/memory/display/ivy-bridge-ddr3_3.html#sect0
post #5 of 5
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Quote:
Originally Posted by Forceman View Post

All the tests I've seen basically say that latency (CAS rating) doesn't matter much at all, and that frequency only matters a little. If you get some decent DDR3-1866 you'll be set for now and the likely future. I'd say get 1600, but the price difference to 1866 is pretty insignificant so I'd hedge your bets with the slightly faster stuff.
http://www.xbitlabs.com/articles/memory/display/ivy-bridge-ddr3_3.html#sect0

I remember reading a few articles back in the X58 days where 1600MHz CAS 6 or 7 were giving out the best gaming performance, albeit by a small margin, I remember a red GSkill (I think) CAS 6 kit being quite popular, I guess things have changed with the newer CPUs.

Anyway thanks for your advice everyone, and to anyone else feel free to post your opinion/advice too!
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