I've been haveing this problem since i first started ocing the board, even at moderate oc's it will just randomly refuse to boot!!! Everything is on. I have my AGP/PCI lock set to 66/33, i've heard that leaving it on auto will solve the problem, i won't be able to get back to my comp for some time, in the mean time i'd like to know if anybody has heard of this. On the OCZ forum one of the guys said that it has been fairly common problem, as asus is having problems makeing a stable BIOS that works with winchester's(figures, i get a 3200 winchester hopeing to get high oc, which i did at 2.5ghz on prime95 overnight without any errors and memtest86 passes also, but this boot problem is unacceptable). If you can provide any links i'd appreciate it. Thanks.