Usually in the Bios your cpu would be running near 100% usage. Also, are you sure that its not 49 degrees F on hwmonitor and 33 c in the bios? Word of advice get rid of the heatsink and get a TX3 evo or a 212 evo if you have some cash. They are boat loads better at cooling and it is a great way to keep your cpu cooler at a decent cost.
212 Evo:
http://www.amazon.com/Cooler-Master-Hyper-212-RR-212E-20PK-R2/dp/B005O65JXI/ref=sr_1_1?ie=UTF8&qid=1387397904&sr=8-1&keywords=212+evo
49 (if its Celsius) is pretty hot for idle, but in order to help you some more I would need some more info like clock speed etc. One other thing is I would check and see if you need to change your thermal paste if it has been a while.
Feel free to ask me if you have any questions.
-Scott