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Better timings by downclocking higher MHz?

post #1 of 4
Thread Starter 
From the reading I have done it sounds like memory performs better for AMD with tighter timings, so my question is this:

Would RAM rated at 2133mhz give better timings when downclocked to 1600mhz
VERSUS
RAM rated to run at 1600mhz stock?

To elaborate, I am comparing this Mushkin RAM from newegg:
1600mhz 7-8-7-24
2133mhz 9-11-10-28

My hardware setup listed below is current.
post #2 of 4
I've asked this before an never got a very clear answer.

I'd think it all depends on the quality of the RAM modules, since the timings on the 2133 are much looser it's prolly the same modules.
Edited by OwnedINC - 10/30/11 at 11:58pm
post #3 of 4
I would choose a kit rated higher than what you'll be running if possible. In the case of AMD (pre bulldozer) I'd go with a 1600 kit, perhaps a 1800+ kit if Thuban based and tighten up any timings. If you're looking for matching a kit with your current one, get the cheaper one and just match timings up with whatever you can overclock the current kit to. I would say that they probably use the same modules.

If by chance you're looking at going Intel at any point, get the 2133 kit - just because it will run guaranteed at those timings at that speed - and Intel kits get more out of bandwidth than the AMD ones tend to.
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The Beast (7820x)
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post #4 of 4
Quote:
Originally Posted by sdahlbe View Post
From the reading I have done it sounds like memory performs better for AMD with tighter timings, so my question is this:

Would RAM rated at 2133mhz give better timings when downclocked to 1600mhz
VERSUS
RAM rated to run at 1600mhz stock?

To elaborate, I am comparing this Mushkin RAM from newegg:
1600mhz 7-8-7-24
2133mhz 9-11-10-28

My hardware setup listed below is current.
There's a trade off between frequency and timings. Both will improve performance. However, knowing exactly which setup will be better is just a matter of testing and benchmarking.

And it's a common misconception that tighter timings don't affect Intel's as much. Since the i series, they're affected just as much by tighter timings as AMD's. For instance 1066 CAS 5 will be a lot faster than 1333 CAS 7. However, 1600 CAS 7 will be faster than 1333 CAS 6.

So really there is no direct answer to this question as your RAM frequency and timings will affect how much you can wring out of the CPU-NB, which again, has a nice impact on performance.

It's basically a balancing act. That's why there's never a clear cut answer but only rather vague ones.
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