Everyone seems to use the 5770. I'd check a few of the threads. If I recall correctly it was either not fully compatible or offered very little in additional performance over the 5770 on the mac pro 1,1.
I think its really about the PCI 1.1 vs 2.0 on the newer gen MP's. I believe that the PCI 1.1 will make the 5870 not perform to its fullest potential and it would be better to get the 5770. Half the price and still a great card.
I think its really about the PCI 1.1 vs 2.0 on the newer gen MP's. I believe that the PCI 1.1 will make the 5870 not perform to its fullest potential and it would be better to get the 5770. Half the price and still a great card.