WinXP and OCing

[Wisey]

Recently I OCed my Intel Northwood 2.6 Ghz by about 30% using Asus P4P800 mobo AC OC, and my WinXP won't boot. My PC can POST and everything seems ok until it's time for WinXP to boot up and it won't. Is this common? What could be the reason?

When I lower the AI OC to 20%, WinXP will boot.

 

[BlueWeasel]

The 30% OC is unstable and that's why XP won't boot up. Either bump the voltage, lower timings, or both.