Almost sent back my ASUS GTX-670
 

I have two and when I first got them my tempertures were around 28c and 26c at idle and around 60c to 65c with a load.One day i got to noticeing my first card was reading 42c at idle and my secound was 28c ,I look to make sure both fans were turning and they were.Then I downloaded the new drivers 306.02 and installed them and both my cards and reading the right tempertures now.I really don't know if it was a driver problem or what.I just know it is working right now.I had the drivers 301.42 installed before.