LuxMark is a utility derived from SmallLuxGPU, it will run your system through some 3D rendering benchmarks and (of course) give a score. You can test your GPU(s), your CPUs, both at once, etc. I get 1953 with my 5770 (2010 2.8Ghz Quad, that was on the Luxball HDR scene) You can download it here: http://www.luxrender.net/wiki/LuxMark#Download It's free/open source, etc, so have fun. And post your scores! (There's a page on their site where you can post results too, a couple of Macs are already up there). Oh! A few notes: keep the "scenes" folder and LuxMark.app together, best to just move the whole folder that unpacks from the zip into Applications. Also, scores aren't comparable between the 2 scenes that are included with it, so mention which one you used.