The H5 SF solves the problem of providing effective liquid cooling for high performance CPUs in cases where a full-sized Hydro Series liquid CPU cooler won't fit It has a pump assembly with a copper coldplate and flexible, low permeability tubing, just like our larger Hydro Series models. They're matched with a one-piece blower which cools the circulated liquid by drawing cool air from the inside of your PC and exhausting it outside the case. So, in addition to keeping your CPU cool, the H5 SF provides additional cooling for the motherboard and other components by constantly pulling cool air across them The low permeability tubing helps ensure long life, and the flexible design makes installation easier in tight spaces. The cold plate uses copper for its excellent heat transfer properties, and pre-applied thermal compound saves you time and mess during installation