Left 4 Dead (DirectX 9)

We used the same settings of 1680x1050, 4xMSAA, 8xAF for both cards in this test, and as you can see they are virtually identicle. The 4870 technically holds a slight edge but this 'edge' isn't detectable in game, even with a frame counter during play. The HIS 5770 1GB is off to a good start it seems.

Enemy Territory Quake Wars (OpenGL)

All three cards were set to maximum settings via the menus in game (but no soft particles), with a resolution of 1680x1050. Once again, 4xMSAA and 8xAF was used. Once again, the numbers are virtually identical for all the cards, although again technically the 4870 has the upper hand.