I recently replaced a ATI 6870 with a GTX 670 and am no longer able to access windows from my primary hard drive.
As Windows begins to load there is a blue screen which is rapidly gone and the computer restarts.
I was able to use a new hard drive and install Windows and the computer works fine which suggests there is no hardware problem. I installed the old hard drive and can access the files but cant boot from it.
Is this likely a video card driver problem? is there anyway I can change the drivers without booting from it? any ideas on any other possible problems that could be solved?