All the 174.xx i've tested on XP32, vista 32 and 64 were better than my official 169.32 drivers. I can't say for the 169.61 ... they not recognized my 8800 GS. Only 169.61 beta ( xtrem-g ) recognized it.
Since 174.xx ones, more stab on O/C, more perfs ... powaaaaa :rockout: