I'm also wondering about this, especially compared to other cards.
Ive been looking into getting a new video card for my 1,1 mac pro for some time but I dont want to pay upwards of 250$ for an apple one just to find out its uncompatable with the mac pro...
Yeah, I believe the 5770 will work with the '06 models, but you need at least SL 10.6.4 (I think) in order to have functioning MDPs.
Just curious: what was the final verdict on the 5870 and the '06/'07 models?
Just saw that Ati released the new low cost 6670, 6570, and 6450, anyone know if you could possible put these in a 1,1 Mac pro, of course after flashing using Zues or from a PC?