NVIDIA System Tools (previously called nTune) is a discontinued collection of utilities for accessing, monitoring, and adjusting system components, including temperature and voltages with a graphical user interface within Windows, rather than through the BIOS.
Additionally, System Tools has a feature that automatically adjusts settings and tests them to find what it believes to be the optimal combination of settings for a particular computer hardware configuration.
Everything, including the graphics processing unit (GPU), central processing unit (CPU), Media Communications Processor (MCP), RAM, voltage and fans are adjusted, though not all motherboards support all of these adjustment options.
BIOS and driver updates to both nForce and GeForce hardware can also be done through System Tools.
It additionally supports hardware which is certified under the Enthusiast System Architecture and connects to the motherboard via USB.