The Perfect MorphOS Machine (Well Almost)

[jj]

I would not hold your breath for Nvidia drivers.   If you not got spare pc to put it in , I would sell/give it away.  IMHO

[jj]

The Mac version of the 6800 GT would have to be heavily modded to work in a PC. First it is flashed for macs. Second it is AGP Pro x8 1.5v, not many PC motherboards implement AGP Pro. Finally the mac version uses the the special ADC edge connector as an Auxiliary power source, instead of a 4 pin molex, or 6 and 8 pin collectors used today. The mac 6800 GT would have to be modified to work with a different auxiliary power source.
 
I am not going to say that this is impossible, it probably is not worth it in 2014.

My bad forgot about the differences between caards.  Flashing can be hit and miss and pain in the arse in itself.  Sell it on ebay