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 ...
CPU_FAN and CPU_OPT are entirely different and serve distinct purposes in the context of a computer cooling system. CPU_FAN or CPU Fan Header is the primary 4-pin fan header on a motherboard, and it ...
I'm stuck. Just putting together a new system and all I have are 3 wire fans for the heatsink. The CPU fan connection on the motherboard is a 4 pin thingy.<br>I can plug in the 3 pin connector but the ...