NVIDIA has released ForceWare 174.53 official WHQL certified drivers for Windows XP/MCE/64-bit.
-Added support for GeForce 9800 GX2.
-Added new PureVideo HD features for GeForce 9800 GX2:
-Dynamic Contrast Enhancement
-Dynamic Blue, Green & Skin Tone Enhancements
-Dual-Stream Decode Acceleration *
*Note: Users will require updated software from third-party movie players to experience the new Dual-Stream decode acceleration.
Release notes (.pdf)
XP/MCE | 64-bit