Just to give you a frame of reference... I have a GTX 960 paired with an i3-2100 on my HT/1080p-gaming PC. It will often reach 99% GPU utilization during graphics intensive games and generally keeps frame rates no lower than 30 and averages in the high 50s to 70s on a 1080p screen at high or ultra details with 2x MSAA (all game-dependent, of course). The GTX 960 with a hyperthreaded i3 makes a great pairing for 1080p.