Your temp is actually normal. Anyway, use either RivaTuner, if you have a non EVGA brand card. If you have an EVGA brand card, use EVGA Precision. You can get it from their website.
temperature seems perfectly fine o.O ATI card goes into the 70+c when it comes to gaming unless you tweak the gpu speed to 85% full power, or atleast i do with the 4850. all the video card from 4890, cooling has improve alot.