Computer keeps rebooting when gaming

[PhobosAE]

Hello guys. I got a new computer a few months ago.
It was working great, but a few days ago it started to reboot when i play games (it just resets like i have pushed the restart button and gives me that message that the computer wasn properly shut down), now i have no idea what the problem is.

My computer is running on win7
i7 4770
Asus Sabertooth z87
Corsair Vengeance 8 gigs
Zotac GTX 680 (standard model)
And the power supply is a Corsair GS700

Please help me. I used some programs to see the temperature of GPU and Processor, the GPU max temperature is 81c and my processor gets a maximum of 85.

Is this ok for the processor and GPU? Think this might be power supply related?

Please help me. Thanks

 

[lookerup]

As far as i know it's NOT okay for the processor to be 85C.

 

[PhobosAE]

Im using the stock processor cooler. Think it might be the problem then?
Also i have no OC on anything, cant figure out why the computer keeps restarting

 

[lookerup]

If the stock heatsink is not working than you might have a problem.

 

[lookerup]

have you tried a bios updatE?