NVIDIA BIOS Editor (fondly known as NiBiTor), got updated to version 6.01 by its developer. NiBiTor is a lightweight NVIDIA GeForce/Quadro BIOS file manipulation utility that lets to fine-tune your
GeForce or Quadro graphics card at the BIOS-level. Version 6.01 packs updated GPU support, some minor fixes and a redesign to support as well unknown devices in some limited way. New GPUs supported by this version are:

GeForce GTX 560
GeForce GTX 460 SE
Quadro FX3800M
GeForce GTX 480M (updated support)
GeForce GTX 460M (updated support)
Source
Download