1gb is not enough for 5760x resolutions, so the cards run out of memory. When you crossfire/sli 2 cards which run out of memory, the result is worse than running it on one card. Try lowering the details of the games (no aa, af, medium textures, etc) , in order not to run out of video memory and you will see that crossfire is working. You can also use less demanding games, to test if crossfire works. I believe it would be better to sell those 6870 and get 1 6950/6970 2gb.
post #21 of 35
2/14/11 at 9:33pm