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 ...

Didn't even realize that there was such a thing as a 4-pin PWM motherboard fan header until... yesterday. Anyways, I had planned on slapping a 120mm Scythe on the Ultra-120 that will be cooling my ...

Fan controllers have hardly been the stuff of copious Internet chatter, apart from the Digidoc 5 back in... hmm... 2001? Do you remember back that far? Back then the ...

The board has been fitted with a Diagnostic POST LED. Once you pass all the boot codes in Windows it'll display the processor package temperature. In case you are wondering, the board has six fan ...