Overclock GPU tool

Tool to help you overclock graphics card: rthdribl - Real-Time High Dynamic Range Image-Based Lighting. its quite useful at overclocking because you can have it windowed.

rthdribl - Real-Time High Dynamic Range Image-Based Lighting 1.2 - thats the link have a try

hmmm... i would be sceptical, given i've never heard of it... why not use something more proven?

I've heard of this. This site is a few years old. Not sure if it's been updated though.