I recently upgraded to a 1.4 GHz OWC Mercury Extreme (QS 2002, originally 800 MHz). Nice speed bump. Nice boost. No problems other than an external USB 2.0 2.5" HD no longer would mount unless I supplied external power to it. However, I believe this is more likely caused by my also having upgraded the video card to an ATI Radeon 9000 which probably demands more power from the PCI/AGP bus. I believe that because the 1.4 GHz processor in the CPU upgrade supposedly draws less power than the original 800 MHz processor. --Steve At 7:16 AM -0700 5/22/05, Richard ramsowr wrote: >by the way did you upgrade your processor or did your >QS come with 1.25 GB ...I'm thinking about up grading >my 733 MHz just for the fun of it and besides you >can't bet the great look of QS