Unfortunately, it will probably be representative of most DX9 games. Doom has a custom back end that uses the lower precisions on the GF-FX, but when you run it with standard fragment programs just like ATI, it is a lot slower. The precision doesn't really matter to Doom, but that won't be a reasonable option in future games designed around DX9 level hardware as a minimum spec.
John Carmack ----------------------------------------------------------------- GeForce FXでHalf-Life 2が遅いのは、HL2がATI向けのコーディングがされているからか? それともDX9ゲーム一般の傾向を表したものか? という質問に対するid SoftwareのJohn Carmackの返答。大体こんな意味: