I installed a new psu and graphics card (gtx 670 ftw) in my comp today, and my comp booted just fine. I went to nvidia.com to install new drivers, and so I did. Then I got a message telling me to reboot my computer so I accepted. My computer reboots, but my screen just becomes black. At first it flickered between light black and completely black. I turned my computer on and off several times but still the same thing. Then the screen became blue (says recovery mode) and there was a message with two options saying that windows 8 didn't load correctly and that I could either see advanced repair options or restart my PC. So I just restarted the computer but there is still a black screen on start up after my motherboard model and the windows logo with the loading wheel appears.