The Apple benchmarks show 75 vs 70 and 106 vs 100 lead for mac pro in Quake 4 and Doom 3 respectively. I must admit I'm shocked. I mean...with the 7300's Mac Pro loses to lower memory version of the same card on an iMac. 2.33 GHz vs 3.0 GHz....much slower FSB. What gives? Shouldn't Mac Pro blow iMac out of the water? Given x1900 should pretty much obliterate 7600?