I spent a few hours with the specs. From what I can tell, the 4870 is better than the 8800 or the X1900. I am actually excited at the possibility of running two TH2G 1280x1024 reliably. I have ordered one and will put it in one of my G1 or G2 machines. I have also ordered a G3 machine and have a 4870 coming in it.