I recently installed a AMD64 3400+ CPU onto a Chaintech S1689 socket 939 motherboard with 510mb of ddr400 pc3200 ram. However, when I try to join a game server in counterstrike source, the loading screen freezes just before I enter the game and my pc reboots. I have installed the latest drivers on the motherboard and graphics card, and the settings are nowhere near being too demanding of the card. I have the XFX Geforce 6600GT AGP in it. Any ideas?