Hi Jeff, I have the new Tibook G4 1ghz. My experience with OSX is limited and that is what I"m using now...but I have 31 instances of EXS running loaded with high quality Giga samples...like Rare instruments, Garritan Strings, Dan Dean winds etc...I think I've just maxed out the system...I need to check the polyphony...I can tell you I"m getting much better performance...subjectively twice as good as my old G4 Tibook 400 mhz. I'll to a little checking and get back... Julie --- In exs-users@yahoogroups.com, Jeff Fisher <jefisher@v...> wrote: > I am thinking of moving from a Tibook 500 (the original with no L3 > cache and 1 Meg of L2) to the new Powerbook G4s with the 166 bus speed > and DDR RAM (either 17 inch or 15"). My main reason for doing this is > that my present machine craps out before I finsh a large orchestration > using EXS24 Mk II using many voices. > Has anyone got one of these machines yet, and if so, how many > simultaneous voices can you get > before Logic stops playback? Can I expect a really significant > performance boost? > > peace > > Jeff F.