NVIDIA has made new ForceWare 81.98 graphics drivers available for both the 32-bit flavors Windows XP and the 64-bit x64 editions. Release Highlights:

WHQL Certified
Application compatibility fixes. For a full list of fixed and known issues.
Mixed vendor support for NVIDIA SLI.
TV-Out/HD-out support for NVIDIA SLI.
Added support for VSync on Direct3D games when running NVIDIA SLI.
Performance enhancements for dual-core CPUs.
PureVideo high definition MPEG-2 de-interlacing support.
Usability enhancements when connecting to an HDTV.
Microsoft DirectX 9.0c and OpenGL 2.0 support

Downloads:

ForceWare 81.98 for WinXP/2K 32-bit

ForceWare 81.98 for Windows XP Media Center Edition

ForceWare 81.98 for Windows 9x/ME

ForceWare 81.98 for Windows Server 2003 x64 Edition Windows XP Professional x64 Edition