Version? It is built into the nVidia drivers. All you need to do is go in and add an entry into the registry. If you don't already know how to get to the registry, go to run and type in regedit. Go to this key HKEY_LOCAL_MACHINE\Software\NVIDIA Corporation\Global\NVTweak, and add a new DWORD value named Coolbits. Now set the value to 3. Then you should have coolbits.