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Can someone check if my memory frequency is correct?

Last response: in Memory
May 9, 2012 12:46:03 AM

Hi all. I have tried figuring this out but I think it's over my head, I'm not sure what should match what. Here are my specs

Win 7 64-bit
Mobo: Asus P8 Z68-M Pro (manual here:
Memory: 2 x 4GB Corsair Vengeance DDR3 (
CPUz says my memory is at around 669 MHz

Mobo manual says my motherboard has these modes:
Auto, 800MHz, 1066, 1333, 1600, 1866, 2133, 2400.

Should I try setting it to 1600? Can I physically damage my system by setting it wrong? I've been having fairly random system instability and have pretty much replaced everything but my case with no help. I'm hoping it's a memory frequency thing. Guy at a PC repair shop told me that there are more frequency issues with DDR3 than there are with DDR2 (I don't remember the specific way he put it.)

Thanks for your help.
a c 146 } Memory
May 9, 2012 1:45:25 AM

CPUz says my memory is at around 669 MHz x2 = 1333MHz

Its DDR = double data rate.
a c 146 } Memory
May 9, 2012 1:46:13 AM

U should enable the XMP mode and it will run @ 1600MHz without any other steps.
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a c 146 } Memory
May 9, 2012 1:47:04 AM

And the CPU u have runs default @ 1333MHz, if u don't set it different.

Best solution

a b } Memory
May 9, 2012 1:49:08 AM

You have DDR "Dual Data Rate" ram. The speed CPU-Z is showing 669 (669x2 for dual rate) = 1338 MHz. You should be able to set it to 1600 (CPU-Z will show 800MHz) at 9-9-9-24 1.5V without issues
May 19, 2012 12:27:49 AM

Best answer selected by bccarlso.
a c 146 } Memory
May 20, 2012 1:08:37 AM

This topic has been closed by Nikorr