Hi folks, I'm back with a small menu of probs - would really welcome help or pointers to relevant topics. Commissioning my new Mac Pro 2.66 I've got all my Intel-ready plugins working and have successfully loaded an 11- Audio track song. MIDI works, too. An important reason that I upgraded was that with my G5 1.6 ( with 3 G RAM) and the samples on a 2nd internal dedicated SATA drive Synthogy Ivory could only deliver 44-note polyphony ( before 'Disc slow' error). (RME Fireface 800) Problem 1. Placing the same sample drive in the Mac Pro, I now get 54-note polyphony. Any suggestions on how to improve this? Seems a lot to spend for another 10 notes :-) (£100 a note) Would Native Command Queuing make a difference, and of so, how to I turn it on? Also willing to try putting 2 matched drives in to act as a software striped Raid array. ( Or a Raptor?) Problem 2. Even more daunting atm is the fact that I can't play the song without an immediate 'Core audio' alert and the song hangs. This even happens when I switch the Audio Engine to internal audio. Problem 3. Troubleshooting the above has had me alter the Audio Engine buffer size and hardware back and forth, and it takes at least 3 times longer to 'relaunch' than under my G5. Problem 4. Loading a new song takes a similar multiple of G5 times. Problem 5. Loading a new song takes over Finder. I can't click anywhere. On the G5, I could happily do anything I wanted with any other app. during load times. Could this be entirely due to the fact that I only have 1Gig RAM in there? Activity Monitor shows an enormous amoung of Virtual Memory for Logic and my other apps. and my weak knowledge of Mac tells me that this requires a lot of HD access. Does the drive have to work constantly because I haven't enough RAM and is this the simple solution to problems 2 -5 ? I also suspect that there might be some crucial differences with the change to Intel but I can't tell what's what - I'm only 3 days into this new beast. tia peter