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What is my REAL Memory Speed?

post #1 of 4
Thread Starter 
Hello,

I have 2x512 sticks of Corsair XMS DDR400. I am getting two different speeds listed by CPUZ and NVidias Hardware Monitor.

CPU-Z says its running at 401.4 (200.7x2)

NVidia's Hardware monitor says its running at 423

Which is right?

Im running an Asus A8N SLI Premium and an Athlon 64 3700 San Diego

I have my FSB at 255x11=2805

HT Mult is 4

Mem Timing it 2,3,3,6 and 1T

Thanks for your help.
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post #2 of 4
Most likley Nvidia's H.M. Your FSB would be too high for the ram to run at stock speeds.
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post #3 of 4
What is your divider? It isnt a 1:1 apparently. I'd say CPUZ is right though, I've yet to see it mess up ram speed.
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post #4 of 4
423 / 255 = 1.65ish divider
401 / 255 = 1.57ish divider
So I'd guess the divider is set at 1.6

So you should be running at 255*1.6 = 408 MHz which is closer to what CPUz is says

But sorry, I couldn't even guess as why you are getting different speed measurements. CPUz and my bios have always been within 2-3 MHz of each other. I would be interested what speeds are recorded on each stick separately (meaning only have one stick in and leave your FSB setting the same)
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