My computer randomly restarts whether I'm playing a game or downloading something or it's in sleep mode. It will stay on for a maximum of about 2 hours and a minimum of 5 minutes. The screen just goes blank and then it reboots. I checked the temperatures, they are all normal (CPU, MOBO and GPU all around 30 celsius). I've been having this problem for a while, and since then I've upgraded my mobo and RAM, so that possibility is ruled out too. I'm thinking it may be a problem with the power supply but I'm not sure. please help
MSI Z77A-GD65 mobo
Intel Core i7 2600
nVidia gtx 580
Corsair GS800 watt PSU
Intel 40gb boot SSD
western digital black caviar 1tb data HDD
Did you scan for viruses? If not hardware, then software.
Also, even though you upgraded your mobo/RAM, you could still have a faulty part. Do a memtest on your RAM to make sure. It doesn't seem like you're using too much power, but the PSU is commonly a problem. Even Corsair can make a bad PSU once in a while!