ThinSkin writes: "After learning about a 20 frames-per-second penalty for running DX10 instead of DX9 in BioShock, Joel Durham Jr. over at ExtremeTech thought it would be a good idea to compare the image quality differences of BioShock DX10 vs. DX9. Long story short: There is no difference. From the article: "BioShock is turning out to be an engrossing and downright fun shooter. DirectX 10, in the meantime, is turning out to be a non-issue. If you decided to play in DirectX 9 for the sake of performance, you're really not missing much at all.""