My computer I built crashes

MrSharp

Honorable
Feb 7, 2014
3
0
10,510
I am a noob when it comes to computers but I decided to build a gaming computer.
My parts are:
fx-8350
PNY gtx 660
msi 970a-g43
Coolermaster n400 case
Thermaltake tr2 600w
2 sticks of ram that total 4gb and 2 hardrives I salvaged from my old hp computer

The computer shuts off a lot, usually during games. The power light starts flashing, and i cant turn it back on unless I turn off and on the psu. Any help would be greatly appreciated. Thanks