MacPro Fan PinOut

[mad86]

yes, it works as 3 pin fan. voltage controlling the speed

Thanks for sharing, that sounds good. I kept the original fans in case I can reuse them one day. Currently I'm using Noctua fans running at 250RMP for most of the time which is almost inaudible.

I know the Delta fans use dual ball bearings, so after a decade time should still perform relatively well. How do these fans perform in terms of noise level? How do they compare with newer fans.

 

[ss2sameer]

I am at 1800 hardly audible

 

[mrdotelie]

I successfully adapted a Mac Pro fan for my build.
orignal

Mac Pro fan pin out
1-> Ground
2->VCC fan logic
3->Taco reader or speed sense
4-> Voltage managed or control

PC Fan pin out
1-> Ground
2->Voltage managed or control
3-> taco reader speed sense

so I took out the pin4 out from the Mac Pro fan header and fed it into Pin2

the original PIN 2 marked as vcc from macpro fan has to be wired to any 12v vcc anywhere from smps or in my case CPU pump header. this power is only for fan logics. as already discussed

The modified pin-2 is the source of power draw.

result ----fan control with bios settings of fan in auto or voltage managed mode same as intel fans. max RPM 2750 normal at 40 degree is about 1800rpm and silent around 1400 rpm.

How many fans are you controlling this way? What's your setup?
You're not including any additional hardware, transistors or resistors?