I have 49-50c idle(!) and I'm almost positive that it's wrong. I completely covered the HSF and ran a linux CPU burn-in app for 15 minutes. Heatsink got hot, but no issues. I think the sensors in this board are hit or miss. Time for some real-world tests and maybe a BIOS flash.
BTY, how do I see what BIOS version I have? Didn't see it.