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'm planning on getting a Z77 motherboard when Ivy Bridge chips come out, so I'm currently planning my setup. I have a case with fans and water cooling waiting. I have 5 fans and 1 pump that all have ...

MSI has developed a new motherboard fan that uses the Sterling Engine Theory to power a fan without using any electricity. This innovative fan leverages waste heat generated by the CPU. The heat is ...

The CPU OPT header is an additional connection for special processor cooling accessories, such as specialized coolers with multiple fans or water-cooling components. Functionally, CPU OPT is identical ...