i7 2600k @4,8GHz Asus P8P67 Pro dual GTX580 8GB RAM Geekbench ~17000 Ok, so I installed 10.7.3 with Unibeast 1.3 and then 5xx support from Multibeast 4.5.1 (userDSTD). Everything seems to work OK, but I'm getting very poor OpenCL performance. Just 204 fps. I think it should easily be 400+. Also, the bottom half of the benchmark window (the waves) flickers extremely while rendering! I don't know if this is normal... I then tried Official Nvidia GPU and CUDA drivers, modified AppleGraphicsPowerManagement.kext and changing SMbios to 12,2, but got the same score What is the best way nowadays to get the BEST out of a GTX580? I'm getting con used by the various (outdated) guides. Also, is there any other OpenCL benchmark I could run and compare results with you guys? Thanks very much!