i recently installed my new 970, and whenever i try to play GTA i get 1 FPS (my old card handled it fine), all other games i own i hit a solid frame rate, but for whatever reason since i got the new card, it's been screwed.
Try using Display Driver Uninstaller to do a clean install of your drivers, if you came from AMD, remove those AND the Nvidia ones, then reboot and install the latest version from Nvidia's site.
Try using Display Driver Uninstaller to do a clean install of your drivers, if you came from AMD, remove those AND the Nvidia ones, then reboot and install the latest version from Nvidia's site.