Constant Reboots help

Jamdre1234

Distinguished
Aug 30, 2013
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Hi i built a PC a few moths ago and in the past 2 months it turns itself off and back on again. It mostly happens when i play games but i have also lost a lot of college work because of this please help.

Specs:

i5 3570k
8gb ram
1TB HDD
Msi radeon 7770
corsair cx 500w non modular
msi z77a-g41 plus mobo
windows 7 64bit (Pirate copy)