I'm not quite sure what I have managed to do, but my guess is that the graphics card is screwed. My motherboard does not have on-board graphics to test this theory. When I booted up having removed all the old paste, replacing it with much better stuff, it loaded up Windows 7 like normal. When the desktop loaded, it was all fractured (parts of the desktop appear fine and others completely messed up/randomly). I restarted the computer, because on top of this, the computer froze up, This happened a few times, before finally I restarted again and the computer booted-up, got to the loading Windows screen and after that, made all the usual sounds (internal) that would suggest it was still loading up into Windows, but my monitor displayed nothing but a blank screen.
Any thoughts? If it is the graphics card, can anyone suggest what I can replace the BFG 8800GTX OC2 768MB GDDR3 Dual DVI HDTV Out HDCP enabled PCI-E Graphics Card with, running on a Corsair 620W HX Modular PSU (ATX12V v2.2 APFC)?
Thank you so much for your consideration!