>> - 667 & 800 on tipb III >> - 400 & 700 on ibook2/700 with 750FX >> - 400 & 500 on ibook2/500 with 750CX > >So, does this mean I can run my 667Mhz tipb III at 800Mhz? :) No, the model sold as "667 Mhz" won't go up to 800, Apple seem to have properly limited the PMU firmware here ;) Ben.