Thursday, June 9th 2022
Arctic Introduces P14 Slim PWM PST 16mm-thick 140mm Fan
Today ARCTIC, a leading manufacturer of low-noise PC coolers and components, introduces a new 140 mm case fan, the P14 Slim PWM PST. Small form factor enthusiasts will appreciate the slender frame of ARCTIC's latest case fan: with a mounting height of only 16 mm, the P14 Slim PWM PST takes up much less space than a standard case fan. This makes it an ideal choice for HTPC cases, SFF and mini PCs.
The P14 Slim PWM PST employs ARCTIC's signature PWM sharing technology (PST), allowing up to three additional fans to be connected in series. Fan speed can be controlled via PWM, and with a range of 150 to 1800 RPM, the P14 Slim PWM PST guarantees high cooling performance while keeping noise levels at a minimum.
Like all fans in ARCTIC's P series, the P14 Slim PWM PST is optimised for static pressure. This ensures efficient cooling even with increased air resistance, making it a great choice for use on heatsinks and radiators as well as in small cases where tightly stacked components, cables or tubes severely restrict free airflow.
The P14 Slim PWM PST employs ARCTIC's signature PWM sharing technology (PST), allowing up to three additional fans to be connected in series. Fan speed can be controlled via PWM, and with a range of 150 to 1800 RPM, the P14 Slim PWM PST guarantees high cooling performance while keeping noise levels at a minimum.
22 Comments on Arctic Introduces P14 Slim PWM PST 16mm-thick 140mm Fan
I also want thicker fans. 38x140mm would be a better solution for delivering quiet static pressure and likely better than sandwiching a radiator between a pair of standard 25x140mm fans.
I used to have 8 of them for a push-pull 560mm rad setup. They were... okay fans, but not great tbh
The number of blades combined with the RPM does play a significant role in the pitch of the fan noise produced, but that's about it.
Did you try just using them in a push configuration? The whole point of thicker fans is that they can produce better static pressure and if I had to guess (I *am* guessing) you'd probably have had near-identical performance out of just using four of them.
I found these P/F Arctic fans to be quite low quality, with noticeable noise at certain RPMs.
Arctic is really doing well.
Pitch (frequency) is not volume (amplitude). In leyman terms, you can sing high or low, and you can sing loud or quiet. The volume you sing at has no real impact on how high or low the note is.
More blades does not mean less noise.
More blades means a higher-pitched noise.
A majority of the fan noise is caused by the number of times a trailing blade edge passes one of the hub supports. Since almost all fans have a hubs supported by four arms, and each blade passes all four arms once per revolution, the number of pressure pulses a second (ie, the sound frequency) is:
(number of blades) * (number of arms) * (revolutions per second).
The volume, or amplitude, of the noise is determined mostly by the relative pressure of the air at the trailing blade edge, and that is a complex calculation involving matrix integrals in SEA fluid kinematics but the dominant factors in how much noise a fan makes are the rate of blade angle change (the aggressiveness of the cross-flow sweep) and the absolute speed of the blades (effectively the RPM).
TL;DR
Large blades either means a shallow angle which means low airflow speeds (and amazing static pressure) but you'd have to spin that at very high RPM to get the same CFM...
...or, it means that there's a big gap between small blades which leads to abysmal static pressure, so CFM suffers because even slightly positive case pressure, a restrictive mesh/filter, or a dense heatsink would be too much for the low static pressure to overcome.
High power server fans with only 3 blades get around this by being 38mm deep, which allows each of the 3 blades to have a much better angle for a good balance of static pressure and CFM.