4 pin molex connector11/6/2022 ![]() ![]() In manual mode, I can set parameters for the fans to operate at different speeds depending on the temperature of the chassis and/or CPU. The MB BIOS has 3 preconfigured profiles that someone could apply to the fans, Standard, Silent, Turbo, and then it has a Manual mode. Since I'm also using a Corsair H100i push/pull system using 2 fan splitters (2-120mm fans on each side) add an additional 2 fans. Then my MB has a 4 pin CPU fan, a 4 pin CPU_OPT fan, 4 pin CHA fans 1, 2, & 3, and 4 pin CHA_OPT fans 1, 2, & 3. My case has a 200mm top fan that looks like is manually controlled. On some motherboards, some headers aren't capable of any kind of speed regulation. I guess the extra pin there is just so you don't have part of the connector dangling on to nothing if you're using a 4-pin fan. Take it on a case-by-case basis.Īlso note that 4-pin fan headers on motherboards may not be actually capable of sending PWM signals, even the ones that you can still control via #1. As for which is better, some fans respond in different ways. However, fans capable of PWM control can certainly be controlled via #1. PWM fans have a fourth pin for a PWM signal to direct how #2 should be done.
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