NVidia BIOS Editor (also known as NiBiTor) is a software program that allows users to edit the BIOS settings of NVidia graphics cards. The BIOS (Basic Input/Output System) is a chip on the graphics card that contains information about its hardware, including clock speeds, voltages, and memory timings. By editing the BIOS settings, users can modify the performance of their graphics cards, potentially increasing their performance in gaming or other graphics-intensive tasks.
One of the main benefits of using NVidia BIOS Editor is that it allows users to modify the voltage and clock speeds of their graphics card beyond what is normally possible through software overclocking tools. This can potentially provide greater performance gains, although it also carries some risks, as overclocking can cause stability issues or damage to the hardware if not done properly.

NVidia BIOS Editor also allows users to edit memory timings, which can further optimize performance. Additionally, the software provides tools for viewing and comparing different BIOS versions, as well as backing up and restoring the original BIOS settings.
However, it should be noted that using NVidia BIOS Editor requires some technical knowledge and carries some risks, as improper use can potentially damage the graphics card or cause system instability. It is important to follow instructions carefully and to thoroughly test any changes made to the BIOS settings.
Overall, NVidia BIOS Editor can be a powerful tool for advanced users looking to optimize the performance of their NVidia graphics cards, but it should be used with caution and only by those with the necessary technical knowledge.