Pc crash grey screen HELP

Henstergamer523

Honorable
May 21, 2014
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I Just Built A Gaming PC For My Friend. I Installed The Latest Drivers For The RX 480.
After 10 minutes of playing Half Life 2 And Civ5, The Screen Goes A Blank Grey Colour And Has An Infinite Beep Coming From The Speakers. Any Help Would Be Great. :bounce:

its not the temps.
It not the psu.
I reinstalled driver and windows and games.

Specs:
Gigabyte H170-HD3 MOBO
I5 6600
1x8gb DDR4 ram
Rx480
Cooler Master 700w PSU
 

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