OK so I upgraded my pc and got a Ge-Force 6100 M9 with an athlon 64 3200 939. After I turn my pc on I would say that maybe 15 mins later it just restarts. I already replaced the psu thinking that it would be that and it still does the same thing. Heatsink is working fine too. Can anyone offer me some advice on what to do? oh yeah and for some reason my hard drives end up really hot. thanks