Ok folks im going to need some help here because something is very wrong. Im doing a test on a 24" iMac 2.8 8800 GTS Vs my new Mac Pro 09 2.66 Quad (with affinity set to use ALL CORES) with a 4890 (at 1000/1100) in OS X playing World of Warcraft. The wow config detect all usable cores on each machine. Let me stress that this is the EXACT SAME OS X as it was mirated to the MP from the iMac. All settings identical .. the iMac get 5-10 FPS BETTER than the Mac Pro using a bios overclocked 4890. Something is seriously wrong here. I need help trouble shooting this as it is really frustrating me to no end. I have covered any senario that I can think of including GLFaster @ 2 on both machines... Thanks in advance here..