Great cooling performance perfect gadget for pc enthusiasts looking for an affordable solution for the cpu cooling enhanced bearing alloylubricant combination to reduce the friction within the bearing and achieve a greater efficiency semi passive cooling the 120mm pwm fan only starts up at a higher load by sophisticated german fan controller optimal compatibility lower footprint of the freezer 33 avoids interference with the ram compatible with intel socket 1150 1151 1155 1156 2011 3 a