I just started getting some instabilities in an otherwise rock solid OC. It started after installing 1306, so I reverted back to 1201, then 1103, and finally back to 803. The problem persists in all these BIOS versions.

Basically, the problem is that I hang when XP boots. It goes from the blue welcome screen, pauses for 10-15 secs, loads up my wallpaper, then that's it. I have full mouse / keyboard control, but can't ctrl-alt-del. BTW, I did manage to get into XP once and threw every stress test I could at it, and I passed with flying colors.

To fix the problem, I started playing with voltages, and lo and behold, by upping my FSB term voltage from 1.36 to 1.40, everything's fine again.

But here's what I don't get....why all of sudden do I need more FSB term voltage to boot? Did installing 1306 screw something up, even though when I reverted to previous versions that problem still persists? Is my XP install corrupt?