Pc crash grey screen HELP

[Henstergamer523]

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.

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

 

[RARRAF]

infinate beeps are a sign of ram incompatability

 

[RARRAF]

maybe the bios of the motherboard needs an update just a thought

 

[Henstergamer523]

infinate beeps are a sign of ram incompatability

Its only when gaming though.

 

[Henstergamer523]

I also updated the bios.