Sweet spot for Ram / timings with 4790k?

Keltik3030 · Jul 7, 2014

Trying to determine the sweet spot for Ram speed/timings for 4790k?

I read haswell likes faster ram more than timings?

I found a nice priced set of corsair vengeance pro 2400 at Cas 11.

2666 at Cas 12 is about 40 bucks more.

2133 at Cas 9 is about 20 bucks more.

What is the sweet spot for a 4790k? Any recommendations.

DubbleClick · Jul 7, 2014

Even though my system is not stable yet, I messed around with my ram a bit.
Similar to you, I'm using a 2400mhz cl11 kit (11-13-13-31-2T XMP), from G.Skill Ares line. I tried 2133 cl9 (9-12-12-30) instead of 2400 cl11, ran PerformanceTest (CPUMark, also checks other stuff) and the results were roughly the same. Had a score of 20 points lower than with 2400 cl11 but that might just be random, wasn't always getting same result with 2400 either.
40 dollars more just for a 2666 kit with slower timings doesn't seem worth to me, 2133 cl9 didn't yield me performance increase. I guess all of those kits are pretty great compared to a standard 1333kit (got about a 15-20% performance increase with setting ram to xmp setting, just a little more unstable sadly, but i'm even getting bsod's with 1333mhz, going to RMA tomorrow I think if i dont get it down this night).

Also, you might want to take a look at:

http://www.anandtech.com/show/7364/memory-scaling-on-haswell/3

Tradesman1 · Jul 7, 2014

Haswell does scale to faster DRAM better than previous CPUs like IB and SB...best I've found for Haswell and Devils Canyon have been the GSkill Tridents in 1866/8, 2133/9 as sweet for gaming, then if you really use your rig (multi-tasking, video, imaging, VMMs, CAD andything with large data sets, might go the 2400/10 or 2666/11 sets

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Sweet spot for Ram / timings with 4790k?

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