Below is a list of tools used for overclocking Nvidia Graphics Cards.
RivaTuner 2.0 RC 15.4
Rivatuner is one of the (if not the) best Tweak Utilities available for NVIDIA GeForce and ATI Radeon based videocards.
Powerstrip 3.58
PowerStrip provides advanced, multi-monitor, programmable hardware support to a wide range of graphics cards - from the venerable Matrox Millennium I to the latest GeForce 6600GT and ATI X850.
NVTweak
NVTweak unlocks many extra options in the nVidia control panel/driver, including but not limited to - Overclocking, AGP & Hardware settings, Fan control, Temperature settings, Debugging, Twin View, Video Mixing Renderer, OpenGL 2.0 support, 3D viewer types (for 3D Stereo drivers), and more.
Forceware Coolbits 2.0
Coolbits 2 unleashes hidden function within ForceWare drivers, it enables several new Direct3d and OpenGL configuration tabs, and even more tweaking capability from the nVidia taskbar settings panel.
Nvidia BIOS Editor
This tool can be used to edit bios image files for all NVIDIA cards, except old TNT and TNT2 cards with Control Block version less than 3
Coolbits
Enable overclocking in NVIDIA Detonator drivers.
RivaTuner 2.0 RC 15.4
Rivatuner is one of the (if not the) best Tweak Utilities available for NVIDIA GeForce and ATI Radeon based videocards.
Powerstrip 3.58
PowerStrip provides advanced, multi-monitor, programmable hardware support to a wide range of graphics cards - from the venerable Matrox Millennium I to the latest GeForce 6600GT and ATI X850.
NVTweak
NVTweak unlocks many extra options in the nVidia control panel/driver, including but not limited to - Overclocking, AGP & Hardware settings, Fan control, Temperature settings, Debugging, Twin View, Video Mixing Renderer, OpenGL 2.0 support, 3D viewer types (for 3D Stereo drivers), and more.
Forceware Coolbits 2.0
Coolbits 2 unleashes hidden function within ForceWare drivers, it enables several new Direct3d and OpenGL configuration tabs, and even more tweaking capability from the nVidia taskbar settings panel.
Nvidia BIOS Editor
This tool can be used to edit bios image files for all NVIDIA cards, except old TNT and TNT2 cards with Control Block version less than 3
Coolbits
Enable overclocking in NVIDIA Detonator drivers.