I bought a Mac Pro 1.1 on the cheap yesterday. It works great, but the video card (7300 GT) sucks. Hence, I am looking for a new video card. After reading a few discussions here, I noted that the Radeon 7850 is apparently the best video card that works with boot screens. However, someone also said that there is little advantage of the Radeon 5870 over the 5770, since the Mac Pro 1.1 only supports PCIe 1. Now I am wondering whether this also applies for the Radeon 5770 and the 787 or not. Could anyone here help me out with this?