Cooling todays high performance pcs is a complex task and a single fan design cant meet every need the fan you use to pull hot air out of your case might not be the best fan to mount flush against a heatsink or radiator static pressure is the measure of how well a fan can push air in this type of highly restrictive environment and this is where the sp120 excels its an ideal solution for radiator and heatsink use as well as drive bay intakes and other locations where youre mounting