System Requirements
Macintosh computer with a 867MHz or faster PowerPC G4 or G5 processor; not supported on Intel-based Mac computers with Rosetta (learn about Universal application availability)
HD features require 1GHz or faster single or dual processor; authoring of HD DVDs requires a PowerPC G5 processor
AGP or PCI Express graphics card
Mac OS X v10.3.9 or Mac OS X v10.4 (or later)
QuickTime 7.0 or later
1GB of disk space required to install application; additional 10GB required to install all optional templates, loops, content and tutorials (may be installed on separate disks)
DVD drive for installation
i've played with some HD footage on my little G5 iMac, I didn't run into any problems with the playback, you just need lots and lots and lots of hard drive space to do a real big project. Considering you're only going to have one or two p2 cards, you're going to be dumping a lot of raw footage on there, I would think.