The NT01-PRO is a completely redesigned cooler based on the NT01-E. The NT01-PRO is designed to cool the latest generation of processors with its six 6mm thick copper heat pipes. It can either operate passively, without a fan or actively, with up to 2 fans (70mm or 80mm) for enhanced performance. The NT01-PRO is also unaffected by the direction in which the cooler must be installed. Whether your aim is to silence the system or increase cooling performance, this sophisticated heat sink will accomplish both tasks with flying colors.