I just got my Powerlogix 1.4 GHz 7457 installed. Xbench Before (450 MHz): 64.97 Xbench After: 122.65 Not quite 2x. Strangely enough, the hard disk score dropped in the upgraded run. Not sure why. Other than disk, the new cpu smokes the old. Excerpts from Xbench. New old CPU Test 167.49 50.33 Thread Test 118.26 40.15 Memory Test 101.94 77.72 Quartz Graphics Test 146.27 71.28 OpenGL Graphics Test 126.54 61.30 User Interface Test 219.27 100.51 Disk Test 70.09 102.02 *huh*?? Sequential 92.09 104.42 Random 56.58 99.72 *this is weird* Uncached Write: 30.85 93.82 *this kills it * Uncached Write: 58.08 101.14 *and this * What happened to my drive?? The CPU is th eonly change. And teh fan, of course. BTW, I barely notice the fan, at least with my wife's Linux box in the same room. allan