topic CPU Cooling fan in Tech Help - Software/Hardware etc

CPU Cooling fan

cbcadmin — Mon, 24 Jul 2023 11:47:41 GMT

Can anyone confirm the pin outs on a cpu cooling fan please?

2 pin - +5v & ground

3 pin - +5v, +12v & ground

4 pin - +5v, +12v, ground & control/temp sensor

The reason I ask is because I have an HP server that has a 3 pin fan where the motherboard has a 4 pin socket. Two pins appear to be connected together! How would that work?

Re: CPU Cooling fan

MisterW — Mon, 24 Jul 2023 11:57:50 GMT

https://landing.coolermaster.com/faq/how-to-connect-a-3-pin-or-4-pin-fan-to-the-motherboard/

Re: CPU Cooling fan

cbcadmin — Mon, 24 Jul 2023 13:36:59 GMT

Thanks. I am still confused how/why the original fan is a three pin one, but the motherboard and indeed the fan has a four pin connector. I've replaced the fan with a four pin one, but despite spinning up, the motherboard reports a fault.

https://www.aliexpress.com/item/905600342.html?gatewayAdapt=Msite2Pc