I used a Tempo in my 7500, and it worked great, except it didn't play movies very well, but it played audio fine, i didn't have those snaps and crackels i've heard others complain about. But I also had upgraded the processor to a 500MHz G3, that might have helped the situation. But I keps a 9 GB SCSI drive in there to, adn used it for the things that required a disk with better performance