Why does my computer restart when playing games?

My computer shuts down about 10-15 minutes after playing witcher enhanced edition?

• My computer shuts down about 10-15 minutes after playing witcher enhanced edition? My computer shuts down about 10-15 minutes after playing witcher enhanced edition? My computer is shutting down after about 10 minutes of play time of witcher enhanced edition. I have a 48 amperage power supply(single rail) I am using nvidia gtx 460 , which requires only 24 AMPS. My power supply is 600 watts. When my computer shuts down it tries to resart but it keeps failing. I have to hold down the power button and force it to shut down. It turns back on with no problems.the temperature of the graphics card is about 50 degrees celciusi down't think it is an overheating issue, because when i turn the computer back on, temperatures anre normal, and there are no problems turining it back on Do i have to make the fan of the card speed up, how do i do that . Please help!!! specs: OS Windows 7 5 gigs ddr3 ram AMD Athlon ii 3.0 gigahertz my video card runs at 49 degrees celscius max my prcessors are at about 45 degrees celscius max shuts down only while playing witcher . I haven't tested any other heavy games(hardware wise) It seems to work fine while emulating ps2 games using pcsx 2 To me it looks like either a bad psu or something in me computer doesn't like the witcher sorry, me CPU processors run at about 45 degrees celscius max I can surf the net for hours without any problems during installation, i got a warning message about driver incompatability, if that means anything about the computer shutting itself off. When it does shutoff, there is no message, no error or warning messages. It just shuts off without any warning I have the latest nvidia video drivers and the game has the latest patch I restart the computer immediately after i shut the computer down, and it starts up without any problem other than the message that the computer did not shut down correctly Now , 24 hours later, the computer shuts off within 3 minutes of turning the on Also, when the power goes out , the led lights on the motherboard are still on, so it might not be a bad psu, but graphics card, an nvidia gtx 460 i gig ddr5 , or bad pcie connecotrs on the psu. I connect the graphics card directly to the psu, not the adaptors that come with the card

• Answer:

  this used to happen to me too. it was because of my power supply. running games like Risen and Assassin's Creed 1 would shut down my computer after about 10-15 minutes of playtime. I got a 900w power supply (give or take, i cant remember exactly lol cbf checking) and it's perfect now.