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 ...

I was doing some reading and wondered if the AIO "pump header" is more than just a sensor header and would actually control a fan. Anyone know? I'd really like to get rid of the "splitter" I'm using - ...

Building a custom PC is supposed to be an exciting time, but there are some common mistakes that ruin the experience. One of those is daisy-chaining too many case fans to a single motherboard header, ...