3 pin and 4 pin fan on CPU fan header

sancco

Distinguished
Sep 16, 2009
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18,710
I currently have a PWM CPU fan connected to my CPU header, and it works fine. If I was to put a Y Splitter into the CPU_FAN slot and then use that to connect the CPU fan (4 pin PWM) and a case fan (3 pin voltage controlled), would the 3 pin fan run at full speed or be regulated with voltage. Would the PWM continue to act as a PWM fan? I'm not sure!
 

Kevinch

Honorable
Jan 18, 2014
50
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10,660
i personally wont touch the cpu pwm fan connector, 3pin or 4 pin they both work fine and control by the MB. Cheap way is to get a $10 fan controller and connect it separately.