There's a noticeable drop in performance when installing Catalyst drivers. Low fps at full screen in any game and non smooth movement in flash animations -games.Besides it's working good anyway, is not supposed to draw faster with drivers? Any of you can measure it and just see what I mean.Windows 8 Pro x64 4 GB RAM Athlon II x2 ATI 6570 1GB DDR3 128 BitsCatalyst drivers: tried all of them (for windows 8 of course ) 64 and 32 bits in 3 PCs with another 6570 and a 7770  The question is: why? Tried without fuel service, only leaving kernel  loaded. There's an improvement but works better without or with default driversNot a big deal in this computer. Only gaming but I work with the other one