When i play like 20-30 minutes or watching a HD video on YouTube my computer just crashes. It's really weird, my screen turns sometimes to white or brown or black and i can't turn off my computer just with the PSU power switch. What could be the problem? It happens randomly in almost every 2 or 3 hours.
Card: nVidia 8400GS
(Sorry for bad English).
Card: nVidia 8400GS
(Sorry for bad English).