The Evo 212 coolers for 30. Off sale price are not a bad air cooler. When there onsale or there a rebate they run about 25 online. If a cooler not on right the CPU going to run hot...to hot and the mb or CPU will shut down.
On older CPU without the thermal safety's they used to melt. Used to end up with CPU with burn hole in it. Most newer system when they run hot they lock up or you start blue screening.