Thanks. Yeah i used a dremel. First cut as much of the mesh out as possible with pliers (you could skip this step though) and then masked it up and then cut into a circle. Then i got some rubber u-channel to put around the edges of the cut and make it look nice. It took a few hours but the air flow is much better and much less noise.
Ive got some plans to improve airflow and sort out the cables :] But that after a while :] GPU before sent as a faulty btw.