Overwatch makes PC Crackle & Sizzle sounds and eventually Restarts PC

[G_WaTT]

Bought a new GPU (GTX 660) to play Overwatch. My system restarted while playing through the opening tutorial. GPU jumps up to 70C shortly after starting the game(menu screen). When I attempted to play again I noticed a sizzle/crackle sound coming from what I think is the PSU. Looking through the forums it sounds like I either need to replace the thermal paste or get a new PSU. My PSU says "Total 680W," but I've included pics in case there's more to it.

PSU:

http://postimg.org/image/eb6lwrmyj/

GPU:

http://postimg.org/image/xkshozlrv/

 

[Phillip Corcoran]

Most likely it's the PSU struggling to meet the requirements of the GPU.

A GTX 660 needs a PSU which has at least 24 amps on the 12 volt rails, your PSU only has 20 amps so it's buckling under the strain.

Many PC builders/upgraders mistakenly think it's only the PSU wattage that matters, it's not.

See third post from top in this thread: http://www.tomshardware.co.uk/answers/id-2413678/gtx-660-power-supply-requirements.html

Get the PSU changed ASAP because if it fails altogether it can kill the GPU too.

 

[G_WaTT]

Thanks. I just ordered an EVGA Supernova 850B2.