So the inlaws computer power supply has died. They went and bought a new one but it doesn't have the 3 pin connector that connects to the motherboard and is labeled for the fan. The cpu fan is plugged ...
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 ...
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 ...
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