As 2nd fan for Hyper TX3 EVO, to improve the poor cooling performance. The volume of the individual fan is already, apparently due to the poor heat dissipation significantly in the audible range, my computer was not going to get quiet with Cooler Master, neither in the Idle even under load.
Because of the volume and the poor heat dissipation of CPU fan in conjunction with the heat sink I had to switch to the Scythe Katana 4, now the computer is subjectively quieter and the CPU is in my opinion better cooled.