New GPU Black Screen

[slowburn351]

So i recently upgraded my GPU from a MSI R5 230 1GD3 LP to a new XFX AMD Radeon R7 370 and after i installed that and installed all the needed drivers i started to play a CSGO with the relief of now i can play on high settings instead of low and i get about 3x the amount of FPS but about 10 minutes into playing my Screen just randomly went black and my monitor lost signal and i just thought it was a minor problem or something and just needed to restart and then i restarted my PC and started playing CSGO again and about 10 minutes in the same thing happened again and i thought that maybe it was just the game so i started playing some H1Z1 and about 10 minutes in the whole PC shut down with the LED blinking unusually and wouldnt restart until i unplugged and plugged my PC back in i dont know what the problem is but please help

System:
CPU: AMD-FX 6300
Ram: 8GB DDR3
MotherBoard: MSI 760GM-P34(FX)
GPU: AMD Radeon R7 370
PSU: 500W

 

[faalin]

What is the make and model of your PSU?