Strange OC problem - Advice needed

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Joined
23 Apr 2007
Posts
76
Hi,

Sytem spec:
Q6600
Asus p5k-e
4x1 gb OCZ 6400
Corsair 620w PSU
8800GT

I am new at OCing and need some advice from you gurus.

I run my system at 356 x9 (3.2 ghz), vcore 1.2875, 2.000 on the ram and it's perfectly stable.
Yesterday I tried 8x400 in order to run the memories at their intended speed. It booted fine and was stable in windows but when i tried certain games it lagged like hell. Where i normally have 70+ fps i Had 10-12.

When i changed back to 356x9 everything was fine again.

What is the problem? Do i need to up vcore? Is it the ram? Something else?
 
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