Nvidia Inspector is a small and handy tool that displays hardware information for Nvidia-based graphic cards. Main features also include: hardware monitoring, Core/Shader/Memory clock tuning, Fan Speed adjustment, etc.
A tool for reading all the information the graphics card from the NVIDIA drivers and overclocking. Actually, it should only be a tool to allow more detailed dumps of NVIDIA graphics cards to the GPU to improve Observer gadget. It is now but a lot more to come so that I would put it to you as a standalone tool. All data and functions of almost 1:1 comes from the NVIDIA driver. So if something does not work, this is also a limitation to 99% of the NVIDIA drivers. Functions that go beyond the capabilities of the NVIDIA driver, it will not be using this tool. It is therefore not "real" voltage-sensor evaluation on display through I2C etc.