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Memory Performance Question

post #1 of 11
Thread Starter 
I can run my ram at 800mhz (4-4-4-12) @ 2.1v or 950mhz (5-5-5-15) @2.1v. My FSB is at 1360 (340 * 9 = 3ghz). Which ram setting would give me the best performance?

Thanks,
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post #2 of 11
well have you tried benchmarks ?

superpi will be the best test to do as it heavily relies on cpu speed and ram timings/speed
    
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post #3 of 11
Thread Starter 
Which level of super PI should I run?
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post #4 of 11
Thread Starter 
I did the 4M level.

@ 800mhz (4-4-4-12) it did it in 1:38
@ 950mhz (5-5-5-15) it did it in 1:40

Guess the tighter timings are better then the overall speed.
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post #5 of 11
Tighter timings have always been better for Super Pi. Try also running some Sandra memory bandwidth benches. I think you will see a bigger boost in bandwidth from the higher speed than you will the tighter timings.
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post #6 of 11
Get PCMark05 and try... that is the one to trust most for your average uses.
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post #7 of 11
In theory the higher freq does give your more bandwith, but the higher latency has to be worth it.

For instance if you have DDR400 ram with cas 2
or if your have DDR800 with CAS 4
does'nt matter your higher bandwith makes up for the lost latency's

But if your have ddr800 with cas 4
or 950 with cas 5

800/4 = 200
950/5 = 190

So you'll average performance'll be lower.

That's my average guideline
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post #8 of 11
Or maybe mix both ? 900Mhz with 4-4-4-12... your ram might take it and you get better performance =)
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post #9 of 11
Thread Starter 
I might be able to do that, but I would probably have to boost voltage to 2.2v, and that kind of worries me.
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post #10 of 11
If you're ram has heat spreaders it will do fine.

If you go above 2.3v you risk frying them.

But all it will do now is shorten it's life span.
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