NVIDIA just released a new set of ForceWare drivers in the flavor of version 81.85. The 81.84 version as inmensely popular and offers really good performance.

ForceWare Release 80
Version: 81.85
Release Date: October 18, 2005
BETA DriverRelease Highlights:

• Compatibility fixes since 81.84 driver.  For a full list of fixed and known issues please view the Release Notes.
• 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

Single GPU Issues Resolved

• GeForce 7800 GT/GTX: Soft shadows in FEAR are not rendered
  correctly.
• GeForce 7800 GT/GTX: The system crashes after a minute or so of
  playing Half-Life 2: Lost Coast.
• GeForce 7800 GT/GTX: The Apple 30ʺ panel display splits into four
  grids at 800x600, 1024x768, and 1600x900 resolutions.
• GeForce 7800 GT/GTX: Application performance drops when
  Gamma Antialiasing is enabled.
• GeForce 7800 GTX, SLI: With SLI mode enabled, the mouse cursor
  image occasionally sticks as the window resize graphic instead of
  being restored to the pointer graphic.
• GeForce 7800 GTX SLI: Resuming from system Hibernate results in a
  corrupt or distorted desktop.
• GeForce 7800 GT/GTX: F.E.A.R demo - The system hangs when
  entering room with volumetric lighting.
• GeForce 7800 GTX: Random pixels appear during gameplay in
  F.E.A.R.
• GeForce 7800 GTX / GeForce 6800 Ultra/ GeForce 6600: There is
  intermittent glowing corruption around the edges of the screen in Far
  Cry patch 1.33 when HDR is enabled.
  This has been partially fixed in driver version 81.85. An upcoming patch for
  Far Cry fixes the issue completely.
• GeForce 6 Series: With the latest FarCry patch, the application profile
  breaks the HDR functionality.
  This has been partially fixed in driver version 81.85. An upcomng patch for
  Far Cry fixes the issue completely.
• GeForce 6800 Ultra: The system hangs when running 3D applications
  on a x16 PCI-E system.

Product Support List Windows XP Professional x64 Edition and Windows Server 2003 x64 Edition 81.85

GeForce4 MX 460
GeForce4 MX 440
GeForce4 MX 420
GeForce4 MX 440-SE
GeForce4 MX 440 with AGP8X
GeForce4 MX 440SE with AGP8X
GeForce4 MX 4000
GeForce4 MX Integrated GPU
GeForce FX 5100
GeForce FX 5200
GeForce FX 5200LE
GeForce FX 5200 Ultra
GeForce FX 5500
GeForce FX 5600
GeForce FX 5600XT
GeForce FX 5600 Ultra
GeForce FX 5700VE
GeForce FX 5700LE
GeForce FX 5700
GeForce FX 5700 Ultra
GeForce FX 5800
GeForce FX 5800 Ultra
GeForce FX 5900
GeForce FX 5900 Ultra
GeForce FX 5900ZT
GeForce FX 5900XT
GeForce FX 5950 Ultra
GeForce PCX 5750
GeForce PCX 5900
GeForce PCX 5300
GeForce 6100
GeForce 6150 LE
GeForce 6150
GeForce 6200
GeForce 6200 with TurboCache
GeForce 6200SE with TurboCache
GeForce 6500
GeForce 6600
GeForce 6600 LE
GeForce 6600 VE
GeForce 6600 GT
GeForce 6610 XL
GeForce 6800
GeForce 6800 LE
GeForce 6800 XE
GeForce 6800 XT
GeForce 6800 GT
GeForce 6800 Ultra
GeForce 7800 GT
GeForce 7800 GTX
Quadro4 380 XGL
Quadro4 550 XGL
Quadro4 580 XGL
Quadro FX 500
Quadro FX 540
Quadro FX 600
Quadro FX 700
Quadro FX 1000
Quadro FX 1100
Quadro FX 1300
Quadro FX 1400
Quadro FX 2000
Quadro FX 3000
Quadro FX 3400
Quadro FX 3450
Quadro FX 4000
Quadro FX 4000 SDI
Quadro FX 4400
Quadro FX 4500
Quadro NVS
Quadro NVS with AGP8X
Quadro NVS 280 PCI
Quadro NVS 285