Did you read the thread about +58 mh/s nvidia modded driver? This was an fake and i payed 200 USD on satoshibox.com.

All i got was the original NVIDIA driver.

You may think i'm stupid, but in my opinion, it can be possible to tweak NVIDIA gpus in this way a litlte bit. Now, i found this video and i'm not willing to make the same mistake... But it sounds possible to me.

By the way: in the mentioned thread, the starter was also suspected to have created the video itself. That's why I made it clear at the beginning. But that was probably not useful ...