I can confirm the RadeonHD 4650 pci working on QuadG5 this video boards working under LinuxPPC On Lubuntu i had video and audio output thru hdmi. here an Example https://www.youtube.com/watch?v=zp_IvG7h5_0 On Debian the HD 4000 audio only is recongnized but no video. Hope this will be a good advance for debian PPC developers Thankyou Luigi