Inadvertenly leaked last week, Nvidia has now officially launched a 320MB version of the GeForce 8800 GTS. The standard 640MB version remains on the market, but at $100 less ($299-349), the new card may well attract buyers who want DirectX 10 support without the cost of Nvidia's performance models. DirectX 10 ships with Windows Vista and supports Shader Model 4 effects unavailable in DirectX 9. The new GTS should already be on sale from select retailers.