I can't get Bioshock to start a game ever since I installed my 4870 with 8.7 cats. I've since discovered that it will start if I select the DX9 option in the Games menu, performance is as you can imagine, pretty stunning. But I'd like to see it with the DX10 goodies.....any thoughts? EDIT: when I say I can't start a game I mean I get through the initial advert screens into the menus, but when I go to start an actual game the screen goes very dark. You can see a feint, dark image of the loading screen, but it just stops there.