I just picked up a new PNY Nvidia 9800GT. I'm getting some significant heat issues. When idling the GPU is at about 55C which isn't too bad, but when I game, even for a few minutes, temperatures jump to about 70C. As this is dangerous for the card, I want to try to bring that down a few degrees. Should I use fan, heat sink, gel? I've never done a cooling project before. Also could somebody reccommend me a good 700W PSU?