I have ati 4670 hd 1gb, and my friend has 4770hd, everything else the same, i mean procesor, ram... And some games go little faster on my comp. (but little difrence, only assassins creed 2 goes faster for 8 fps) But anyway both cards are awsome.... Watch my chanel (danilovic97) on youtube for some gameplays (if you wana play crysis on very high then i sugest you get 4850 hd, anyway other games go rly fast, its your choice, but now im thinking about buying ati 5000 series cuz of dx11, and 1 more gb of ram cuz of performance, whatever you chose you wont be disapointed cuz you will play every game on max with good performance...