The sheets make the 6770 Barts xt look better if not double than the 5770 Juniper xt in terms of texture units, texture fillrate and pixel fillrate. How much faster will it be? What do these mean? The 6870 won't be the fastest apparently and made me confused. The problem is I currently have a 5770 but I may be considering to get it crossfire. If the 6770 is worth it I may get it instead of a crossfire 5770. Ill just use the 5770 in another computer or sell it.