fan noise may not be a pc running hot if they were 3 pin fans plugged into a cheaper mb that has no fan control. if it is a cheap mb and there no fan profile for the case fans they can run at 100.00 all the time or if there plugged into the power supply. cpu fan if it the stock intel fan will run about 800-1200 rpm stock and with the pc sitting will run temps about 40-45c. that if the paste is put on the cooler right and the cooler on tight. if your gaming a lot your better off using a evo 212 cooler for the money and some good thermal paste if you need to pull the cooler off.