when i oc the cpu via BIOS to 3.2 or 3.4 my computer freezes in games " cs:s ,FSX, Test drive unlimited and some nvidia demos ,3Dmark06" sometimes after a few minuets ,sometimes after hours .
i have the latest BOIS 1.4.1 and all the latest hardware drivers .

XPS700
Core™2 Extreme X6800
2x evga 8800gtx superclocked 768mb 626/2000MHz
nForce 590 chipset, dual X16 PCI Express
2GB corsair dominator PC28500 @ 800mhz
2 x 250GB SATA Hard Drives
Dell 2407WFP
32-bit WinXP Pro-SP2 & Vista Home premium
3Dmark06-13753