Next, the fan is a generous 120mm. First, before you purchase this kit, you will need to make sure that your case has plenty of room to fit the fan and radiator assembly. My new case has a built-in grill for a 120 mm fan and it was STILL a little tight on mounting the fan and radiator. This Sunon fan is very smooth running and runs much slower than most other fans at a rated 2700 RPM. At this speed, it delivers about 95CFM at a low 36dba. In actual practice, this fan was virtually silent and is one of the quietest fans you will find anywhere – it is no louder than any standard case exhaust fan that I have used in the past.



Link: MHW