Haha, that's not hot at all. The Athlon 64 X2 processor line has a 49-61C maximum temperature range, depending on which model you have. In Fahrenheit, that's a 120-141F range and neither of your cores are anywhere near that. The motherboard and GPU have similar temperature tolerances, so those temps are normal for a computer.
And yeah, dust out your rig, it couldn't hurt.