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Looking for the best memory upgrade option...

post #1 of 8
Thread Starter 
OK, so a little back story. Back in October I blew up my 3960X doing some benching and got it replaced through the Intel Tuning Plan. However I decided to sell the 3960X and move on to IB-E and a 4930K for the much improved IMC which was a minor bottleneck on my old 3960X in the benches. Well I got the 4930K installed but then life (and the holidays) happened and here we are in March and I have yet to upgrade that memory! doh.gif Anyway, the quad channel 4 x 4GB Patriot Viper Extreme kit I have right now is pretty decent. Its stock speed is 1866MHz at 9-11-9-27 and I run it 24/7 at 2133MHz at 10-12-10-28 rock solid stable but I'd really like some 2600+MHz memory for the benches. I pretty much am decided on Corsair Dominator Platinum kits (I know I can get better price/performance out of some G.Skill Tridents but I want the "look" of the Corsairs) but am having a hard time deciding which kit would give the best ultimate performance. I can get something like a CAS 8 kit at 2133MHz which would likely OC well or I can get something at 2666MHz stock but at CAS 12. What do you guys think, what is more important to ultimate benching performance: Clock speed or low latency? Thanks for any suggestions you may have! thumb.gif

post #2 of 8
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Edited by billbartuska - 3/20/14 at 8:42pm
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post #3 of 8
From last what I read, clockspeed is favored for Intel CPUs and timings for AMD.
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post #4 of 8
Thread Starter 
I'm definitely going with Dominator Platinums (for the looks) so I just need to know basically which would be ultimately faster, 2133MHz at CAS 8 or 2666MHz at CAS 12?
post #5 of 8
2133MHz CAS 8 sounds a lot better real speedy latency, Dominators look hot.
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post #6 of 8
I'm sure these all overclock good so I say go the cheapest one because you may be able to tweak the latency down on the higher CAS models.
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post #7 of 8
Quote:
Originally Posted by Majin SSJ Eric View Post

I'm definitely going with Dominator Platinums (for the looks) so I just need to know basically which would be ultimately faster, 2133MHz at CAS 8 or 2666MHz at CAS 12?

I don't think there is a debate of which is faster. We clearly know which memory is faster it's just a matter of figuring out if XYZ CPU plus XYZ board can run the memory at its rated speed. People have had trouble before running high speed memory on their motherboard and cpu combo. Anandtech reports that only 10% of highspeed memory will work with Ivy Bridge CPUs, not quite sure that applies to Ivy Bridge E also but I remember there's some kind of cap. Read more about how memory works:

http://www.anandtech.com/show/6372/memory-performance-16gb-ddr31333-to-ddr32400-on-ivy-bridge-igp-with-gskill

If I remember correctly someone on OCN had a problem running 2400+ memory on an Ivy Bridge CPU. It's because of the limitations of the CPU and the board. There's pretty much no guarantee that you will be able to run 2400+ memory on Ivy Bridge processors. The person who got 2400+ memory got stuck running it at 2133 speeds. Kind of a waste of money if you can't run the memory at its rated speeds. But you are free to do what you think is best for you.
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post #8 of 8
Theoretically, 2133 mhz at CAS 8 would be 20% faster than 2666 at CAS 12.
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My System
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Hard DriveOptical DriveCoolingOS
Samsung 840 PRO Asus DRW-1608P (x2) Custom Water Cooling Win7 (Ult), Win 8.1 & Win Server 2012 R2 
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2 X Samsung 915N Ducky Shine III, Blue Cherry/Blue LEDs PCP&C 1kw Lian Li PC-71 (W/Window) 
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