RivaTuner is the most powerful tweaking utility for NVIDIA display adapters running under Windows 98 / Windows 98 SE / Windows ME / Windows 2000 and Windows XP. The purpose of this utility is to give you access to all the undocumented features of the Detonator drivers. RivaTuner is a very useful video tweak utility.

All versions of the Detonator drivers have a lot of undocumented registry entries. Some of them don't affect anything, but there are some that are very useful. In general, they cannot give you big performance boost but they can improve image quality and solve some compatibility problems.

RivaTuner will help you to change all undocumented registry entries.

RivaTuner is a complete powerful tweaking environment, providing you everything you may need to tune NVIDIA GPU based display adapters. The widest driver-level Direct3D / OpenGL and system tuning options, flexible profiling system allowing to make custom settings on per-application basis, both driver-level and low-level hardware access modes, unique diagnostic and realtime hardware monitoring features and exclusive power user oriented tools like built-in registry editor and patch script engine make RivaTuner's feature set absolutely unmatched.
RivaTuner supports all NVIDIA display adapters starting from Riva TNT family up to the latest GeForce 7 series and widest range of NVIDIA drivers starting from the oldest Detonator 2.08 up to the newest ForceWare drivers family.

In addition to complete NVIDIA hardware support, RivaTuner also provides limited support for display adapters based upon ATI RADEON 8500 and newer ATI graphics processors. All RivaTuner's features besides driver-level tuning options are also available on supported ATI hardware.

The RivaTuner Support Forum can be found here. System requirements:

Windows 98 (updated MFC libraries required), Windows 98 SE, Windows ME, Windows 2000, Windows 2003 Server x32, Windows XP x32, Windows XP x64 edition, Vista x32 or Vista x64 (disabled driver signature checking required).
Note: Windows 9x/ME is no longer officially supported since version RC15. It doesn't mean that RivaTuner will not work under Windows 9x/ME, but it does mean that RivaTuner is no longer tested for compatibility issues under these OS.

Any desktop display adapter based on NVIDIA NV4, NV5, NV10, NV11, NV15, NV17, NV18, NV20, NV25, NV28, NV30, NV31, NV34, NV35, NV36, NV38, NV40, NV41, NV44, NV44A, NV48, G70, G71, G72, G73, G80, G84, G86 or G92 GPU or ATI R200, RV250, RV280, R300, RV350, R350, RV360, R360, RV370, RV380, R420, RV410, R423, R430, R480, RV515, R520, RV530, RV560, RV570, R580, R580+, R600, RV610, RV630 or RV670 VPU based display adapter.
Note: RivaTuner doesn't declare official support for mobile graphics processors and multi-GPU SLI and Crossfire configurations. Proper functionality on such systems is not guaranteed, use RivaTuner at your own risk.

Detonator 2.08 or higher NVIDIA reference drivers for Windows 98 / Windows 98 SE or Windows ME.
Detonator 5.08 or higher NVIDIA reference drivers for Windows 2000 / Windows XP.
ForceWare 96.xx or higher NVIDIA reference drivers for Vista.

The license of this software is Freeware, you can free download and free use this diagnostic software.