Fan detection, speed reporting is a new thing. It is still common to find a fan that isn't being monitored. Since fans are easy to replace, test and such why not fix that? Also since there are ways to control speed with thermostatic feedback, why not do that?
Link -> http://www.newegg.com/Product/Product.aspx?Item=N82E16835118217
So the usual advice for heat issues repeats a lot so let's do that.
1. Do this -> http://reviews.cnet.com/4520-11319_7-6240575-1.html
2. Pull the heatsinks, clean off the compound, get new compound, apply, button it all up.
3. In a pinch? Leave the case cover off. (which you did.)
Help, my PC with Windows 10 won't shut down properly
Since upgrading to Windows 10 my computer won't shut down properly. I use the menu button shutdown and the screen goes blank, but the system does not fully shut down. The only way to get it to shut down is to hold the physical power button down till it shuts down. Any suggestions?