"Its not a serious issue though really, its just a driver bug at best. There is a 'fail safe' setting if the core gets to 140*c that it throttles back but i think this needs some serious adjusting. However maybe 140*c is the limit before serious damage occurs (not just artifacts/curruption) so..."
I seriously hope that the card gets nowhere near 140 degrees Celcius. Do you have any idea how hot that is? Water boils at 100 degrees C (212 degrees F). 140 degrees Celcius is 284 degrees Fahrenheit. I would think the card would meltdown well before this.