Diameter and how the fan is controlled tell you the most about it. A 140 mm fan moves the same volume of air at a lower speed and therefore more quietly than a 120 mm one, and a PWM-controlled four-pin fan knows how to slow down when the machine is not under load. The PST models in ARCTIC's P series chain to one another through a single motherboard header, and Darkflash's ARGB fans are aimed at those who want lights in a case with a window.
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Diameter and how the fan is controlled tell you the most about it. A 140 mm fan moves the same volume of air at a lower speed and therefore more quietly than a 120 mm one, and a PWM-controlled four-pin fan knows how to slow down when the machine is not under load. The PST models in ARCTIC's P series chain to one another through a single motherboard header, and Darkflash's ARGB fans are aimed at those who want lights in a case with a window.