For a system to freeze in the BIOS, I would rule out the PSU for now. I would remove and reseat the cpu. Remove 1 RAM module if possible and test the RAM sticks individually. Test a friend's RAM or CPU if you have access.
If that doesn't work, find your receipt and send your MB and CPU in for testing. Are there any areas on the MB that are too hot to touch while it is on? That was the giveaway when I finally cooked my old Asus MB.
If that doesn't work, find your receipt and send your MB and CPU in for testing. Are there any areas on the MB that are too hot to touch while it is on? That was the giveaway when I finally cooked my old Asus MB.