i just got this mac from a friend and would really want to upgrade its hard drive and graphics card. i got a 6800gt, which i just realized cannot be used because i couldn't find connector for a zalman fan that is on the card. i've read a bit about compatible cards and i see some talk about flashing a card to work on a mac. are there some ATI cards i can buy and install in the g4 out of the box? system as it is works just fine, but pages that contain some flash are impossible to surf on, everything feels so sluggish. much appreciated for your help.