My old zotac 780 ti oc had artifacts of green lines on screen and blackscreen when installing the gpu driver.so i RMAed the gpu and got a brand new same gtx 780 ti oc and after using it for sometime i launched siege and it got blackscreen after restart again gpu driver not recognized plus blue dots appear on screen and black screen when trying to install nvidia driver.i have doubt on my PSU(WHETHER ITS THE PROBLEM) my PSU is cooler master thunder 600watt. Help me please please.