http://www.nvidia.com/object/ntune_5.05.47.00.html

Release Notes:
  • This is a complete, updated release of the NVIDIA nTune. You are not required to install a previous version of this application before installing the latest version.
  • nTune 5.05 adds support for GPU temperature monitoring and overclocking on all motherboards.
  • On nForce motherboards where specific BIOS support is not available, only basic functionality will be available.
  • Products support for advanced motherboard monitoring features:
    • nForce 220, nForce 220D, nForce 415 and nForce 420D
    • nForce2 and nForce2 400
    • nForce2 Ultra and nForce2 Ultra 400
    • nForce2 400R and nForce2 Ultra 400Gb
    • nForce3 150 and nForce3 PRO 150
    • nForce3 250, nForce3 250Gb and nForce3 PRO 250
    • nForce4 Pro 2200, nForce4 Ultra, and nForce4 SLI
    • nForce 590 SLI, nForce 570 SLI, nForce 570 Ultra, nForce 550
    • nForce 680a SLI, nForce 680i SLI/680i SLI LT, nForce 650i SLI/650i Ultra
  • Supported operating systems for this release:
    • Windows XP (32-bit)
    • Windows XP x64 Edition
    • Windows Vista (32-bit)
    • Windows Vista x64 Edition