I am thinking about to upgrade my PowerMac G4 (AGP Model, at 576MB Ram) from 10.2 to 10.4. I had upgrade my computer processer from 400Mhz to a 1.2Ghz Sonnet Encore/ST G4 processor. When I checked the apple site, I saw one of the hardware requirement on 10.4 is it do not support "processor upgrade card". However, on the Sonnet site, it said that the 1.2Ghz processor upgrade card ( http://www.sonnettech.com/product/encore_stg4.html ) is support 10.4. So my question is can my computer be upgrade with this 1.2Ghz Sonnet Encore/ST G4 processor?