Review on 🌀 Noctua 140mm NF-A14 iPPC-2000 IP67 PWM Heavy Duty Cooling Fan, Black - High RPM, 4-Pin Connector by Derrick Milkie

- 2x front inlet 1x rear outlet in Corsair Air 540 case.- Pushes air through polyurethane mesh filter and then case dust filter, no problem. Fans and NH-d15 are very good. I haven't checked the before and after temperature, but thermal throttling is now not possible in my current build and overclock settings. The PWM is easily controlled using a Silverstone PWM hub ($15) on my old MB with only one PWM port. - Audible characteristic low hum under moderate load, but can get noticeably louder under full load. However, they can definitely be kept low/almost silent by adjusting the PWM settings. - Not brown/beige. Added colored silicone anti-vibration corners. Farewell, Noctua!