Alright, I got a real perplexing one here. I ordered a Zalman fan controller. The power connections are standard 3 pin male.<BR><BR>I realized I needed an adapter to connect my 4 pin fans to it, so I ...
IIRC the extra pin on a 4 pin motherboard header may report if the fan has totally stopped, like a failure line, to tell the mobo to shut the CPU off. I've got an old 4 pin fan here from a '94 vintage ...