My 8900 recently locked up and would not restart without freezing. I left it off for an hour or so and then it would boot up again only to freeze after about 20min. I ran memtest and found one of my sticks was bad. The other one ran with no errors. However, that did not solve the problem and will boot after sitting, but then will lock up. When I try to reboot, it will lock up on detecting RAM at about 6M. Is this a Mobo problem, RAM problem, heat problem, or something else?





