>I'm with you George. I run 2 UAD's in a non AMD 8131 Dual 2ghz G5 and >regularly run them over 90% with complete stability and no computer >slow down. Well that's great for the very few out there that don't own a Mac with PCI-X. However, this does very little for the 90% that DO own a PCI-X Mac, with the dreaded AMD chip. What you're actually saying here is that if you own a Mac from the "old school" PCI days everything is fine with the UAD-1 card, which is apparently stuck in the "old school" days of PCI. Any newer thinking or change in the Bus, and UA is lost and they can't figure out how to make their card perform properly. (Which BTW they promised to fix, and stated they were working on a fix) This is because they are selling an OLD design and they refuse to update that design. (And it needs to be updated, IMHO) The original message posted was about trying a UAD-1 card in a PCI-E Intel Mac, and my advice stays the same. When they come, let's hope Universal Audio does a better job with PCI-E than they've done with PCI-X, because my UAD-1 card works more efficiently in my OLD G4 running OS 9, than it does in the G5 running OS X. Since the G5's with PCI-X have been out for years, UA should have designed a newer card to work with the new G5s or offered a Firewire UAD-1 bridge..... or something. I wonder what their excuse will be for the PCI-E bus? Cheers.....NOT!