Hi, i have read many things about a bug in Lion, that you have some problems after sleep with the ATI Cards. My ORIGINAL 5770 drops in performance after sleep (Cinebench from 31fps to 16fps). If i make a restart every things is just fine. I have done all things possible. Do a clean (only System and Cinebench) install, delete PRAM, SMC, repair permissions ... my problems is always the same like before. A friend of me has got the same configuration and he doesn´t have these problems I have take a look to the ML Preview and of course there is the same problem. In some hackintosh Forums there are a workaround to change the ModelID but this is not an option with my original Mac Pro. Any hints for me?