I ordered a 2.33GHz Core 2 Duo MacBook Pro the day after they were released and I have been extremly pleased with it. Except for one thing. When I remove the battery it seems the machine clocks down significantly. I forget the name off the application, but it would display the current clock speed, with out the battery it would be 1GHz. I let this side for a while, reinstalled OS X since then, forgot about it, until today. I ran XBench today, top is without battey, bottom is with. Code: Score Details Results 51.69 System Info Xbench Version 1.3 System Version 10.4.8 (8N1037) Physical RAM 2048 MB Model MacBookPro2,2 Drive Type Hitachi HTS541612J9SA00 CPU Test 51.69 GCD Loop 116.66 6.15 Mops/sec Floating Point Basic 56.28 1.34 Gflop/sec vecLib FFT 42.01 1.39 Gflop/sec Floating Point Library 36.70 6.39 Mops/sec ---------------------------- Results 120.24 System Info Xbench Version 1.3 System Version 10.4.8 (8N1037) Physical RAM 2048 MB Model MacBookPro2,2 Drive Type Hitachi HTS541612J9SA00 CPU Test 120.24 GCD Loop 265.89 14.02 Mops/sec Floating Point Basic 131.62 3.13 Gflop/sec vecLib FFT 96.68 3.19 Gflop/sec Floating Point Library 86.48 15.06 Mops/sec The only thing I have really noticed slowdown on are iTunes visualizations and 1080P videos slow down a fair bit. It is a little annoying since I'd like to just put the battery at about 60% charge and store it for a while when my MacBook doesn't move for weeks at a time. Anyone have any insight to this?