I tried my E8400 again last night with bios 2602 and got the exact same results as I did with 2504. It would boot with no problem at all but reboot just after loading windows. I put my e6600 back in and all is well.

Do you guys think it has anything to do with the revision of the board? I don't remember the exact revision of mine but it only goes to 1.65 for the NB. The chip information reported is accurate, but when loading all bios defaults and then looking at the reported cpu voltage in the bios it reads at 1.75. The lowest voltage available for me to choose is 1.375 and I know that this is WAY off.

Any ideas?