I installed a Zalman fan on my GPU. To control the fan speed, you have four power cables you can plug in. Each on a different speed. I have the highest speed plug, plugged in. My GPU temperature holds a 60 degree celcius with no load, and playing Dragon Age Origins at 1080p resolution with all max settings (including 8x AA) I hit 89 degrees celcius. The card performs great with no lag at all. I'm worried about the temps.
http://www.newegg.com/Product/Product.aspx?Item=N82E16835118117&cm_re=zalman_vga-_-35-118-117-_-Product
http://www.newegg.com/Product/Product.aspx?Item=N82E16835118117&cm_re=zalman_vga-_-35-118-117-_-Product