Just after I posted the last time my computer rebooted without warning again. So Ive changed my settings and I have the CPU on 100% load for over 2 hours so its looking good @ just below 3.5ghz.

I have the V1.1 Motherboard too and I can get to 3.6GHz no problem, at a fairly low vCore of 1.4475V. It runs Prime stable at that speed.

Any higher and I need to go over 1.5V for the tiniest of gains and I start getting stability issues. I think the droop may be the problem. The temps start getting high quickly once over 1.5V.

I can boot at 4GHz (1.59+V) but once I start doing anything it bombs out.
Its definately my CPU then but 3.5ghz is still a good OC in my books. Yeah I can boot up @ 4ghz myself but windows wont bootup for me. Anyway Ill be upgrading my watercooling soon which could also be my problem.