the 5770 is a great card, a second and you can dominate any current game, and they are supposed to be the best for overclocking as long as you make sure nott to go overboard, monitor their temps and artifacts(errors in the processing that manifest in many ways but basically something that doesn't look right) run some good benches that'll stress them so they will appear and make sure the bench monitors that stuff, but this stuff is for if you overrclock, and if you do you'll have a beast on your hands.