Hi, I've had my Antec Sonata Running fine for a few months now. As of late, the back case fan has been running 24/7. Usually it would only turn on when I was gaming, or doing something that generated lots of heat. I am running a AMD 3700+ San Diego, with cool-n-quiet enabled on an asus a8NE. Temperatures from speedfan and everest are showing quite normal. What could be the problem. Btw, cool-n-quiet is active because I checked power-now dashboard, and it shows full conservation.