I was in the exact same situation you were in with my Powermac AGP. There was a 128 mb PCI card that I tried, but it was slower than my 16 mb AGP card that I already had! I splurged on the card above, and it was totally worth it. iLife 06 works.. Nanosaur and Halo work on intensive settings.. It defiantly puts the power back into your mac.