What pin configuration do Noctua fans use? : Noctua Knowledge Centre
DELL fans use a different pin-layout than normal fans, so watch out before connecting them! « The Wiert Corner – irregular stream of stuff
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FAQ: What pin-configuration do Noctua products use?
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Amazon.com: ZOZOMOTORS Dual Electric Fan Relay Kit Radiator Electric Fan Thermostat Kit Temperature Sensor Switch 185 On 175 Off, Automotive 40 AMP Cooling Fan Relay Switch Kit 4 Pin, Dual Electric Fan