hi there guys. i am new here. couple of days ago, i 've change my CPU heatsink. from the stock fan to Cooler Master N520 due to an alarming rise of temperature. (idle temp. 99C that is no application running.) so i change the heatsink. now the idle temp is 55 max on the REAL TEMP 3.60. is this the normal temp? what are the recommended TIM?