The only model ever shown working is the PowerMac12.1 aka "iSight" running at 2.1GHz.
These all come with Radeon600XT while Radeon9600 would suggest the 2.0GHz "Ambient Light Sensor" 8.2.

The iSight shares a lot of HW with the PCIe tower G5s, so there is still a small chance of getting supported at some time.

The main issue I have (at least with my iSight-iMac) is that the screen just isn't that good, so I'm not sure I'd bother registering it if that ever is an option.