Gaming Rig crashing...plz help

KrtR1992

Commendable
Aug 14, 2016
1
0
1,510
This is my build...
Processsor : i7 3820
Motherboard : Gigabyte GA X79 UD5
Graphics Card : Nvidia GeForce GTX 680
RAM : Corsair Vengeance 8GB DDR3
Power Supply Unit : Cooler Master Silent Pro 700W

Recently whenever I try to turn on the PC the gpu fan speeds up and the screen stays black, sometimes it turns and manages to log in to the desktop before the abovementioned happens and it crashes after a few seconds..this has been happening for the last few months and as of now it is virtually impossible to turn on the PC as this problem keeps happening gpu fan revvs up screen blacked and crashes...please help !!!!!