I have tried 61.34 (came on the eVGA setup disk), 61.77 (official nVidia release), and 65.76 (pcguru). All three ran the 3Dmark2003 (10500 range) within 1000 points of each other with the 61.34 being the highest. In Doom3 time demos the 61.77's were about 5fps faster than the other two. Other people have said the 65.76's run the best, but I didnt find this to be true. What do you guys find with your 6800 GT's?