Thanks for the reply.
If the GPU was getting hot in linux surely in Windows fan would speed up, but its not. The fan stays very quiet.
And the fan that is on the GPU isn't the stock one - it is a Thermaltake one. Which supposedly runs at 29dba. But I dont think that it is at all. Any more ideas??
I thought that there may be some kind of option that I could put in my config file to limit the voltage - but maybe I'm just dreaming. Any more help would be great.