System keeps crashing 5 minutes after booting up

[jjjameson]

I'm looking for a little help if someone could indulge me. When I turn my computer on I have about 5 to 10 minutes before the power shuts off. All on its own it begins to power back on and then shuts off again. Over and over again it'll try to power back on but just shuts down again and the only way to keep it off is to keep the power button down. One source tells me it's the video card overheating but I replaced it with an older card and the same thing happens. Could something else be overheating? Does this problem sound familiar? Any help would be greatly appreciated.

 

[treefrog07]

It could be a failing PSU, or a bad power or reset switch, or any of many other items. Please post your system specs, including the make and model of your motherboard, RAM, CPU, power supply, graphics card(s), HDDs, CD/DVDRWs, sound cards, and any other installed hardware.

 

[JackNaylorPE]

Have you checked temperatures of CPU / GPU ?

Have you run torture tests ....i.e. OCCT ?

Any Event viewer messages ?

Analyzed mini dump files ?

IS auto restart disabled ?