Drivers. Uninstall all the display drivers. That will be everything from AMD and just the display from Nvidia. Now use driver sweeper in safe mode to remove the nvidia display drivers and all the amd stuff. Reboot normally and downoad drivers from nvidia and install.
Ah it does. A little digging shows that the 7770 does as well. Futureshop in Canada has one for 170. Its a tossup between getting that card and waitin for something better in the new year. There has to be some sales then.