Hey all, I just wanted to make sure that I am using my two Mac Pro video cards in the best configuration. I have the X1900XT in the x16 slot on bottom slot #1. Then I put the 7300GT in slot #3. The expansion slot utility came up and made it appear that slot #4 would allow or x8 speeds, but the middle two slots would not. I switched the 7300GT card up to slot #4 (picture 2) which seems like the most optimized setting. Since Apple claimed that you could put four 7300GTs in a Mac Pro, it seems strange that I get a message saying that it won't run at maximum speed. Any confirmation on whether this is the best setup?