my system reboots automatically help!

[Martin]

Or if you needed while running Windows, either use Motherboard Monitor or HMonitor, or head over to your motherboard manufacturer's web site and a temperature monitor program should be available for your motherboard model.

 

[Dice]

i just built a custom system and periodically it just restarts by itself? does this happen to any else? how do i fix this? thanks.

you're not overclocking are you? maybe you've changed the settings in the bios, try to Load Optimized Defaults