3D-cards on imacs

[troypolla]

I have an indigo imac and I want to upgrade the 3d card in it but i dont think there is a way what are my options with cards and If anyone knows how to do it let me know.
thanks

[saint.duo]

(someone correct me if I'm wrong)

All of the iMacs have had their video card (actually video card components) soldered onto the logic board (and/or AV board). I would say there is no way to change the video card in any iMac except for the Rev.A and Rev.B bondi blue iMacs, that had the mezzanine slot.