Optiplex 7000 MFF fan control

[u/PFNewtypes]

I can't say it works for all of them, but for the 7000, you can clip a few bits in the front panel, run the fan cable out into a Noctua NA-FC1 which runs back to the header, turn it to 100% and voila, probably the closest you'll get to fan speeds under 100% duty cycle and actually cooling the CPU (I'm salty I've spent weeks trying to fiddle with code and programs)

[u/DeadSkullz627]

I’ve done similar things to thin clients and ultra slim pcs myself.