I have acquired some old server fans for a project and while red and black are obvious, I'm not sure what to the blue and yellow wires are for. I'm guessing speed control and temperature sensor. It's a NMB-MAT fan, model 3615ml-04w-B76. I'd love to be able to use these two functions or what ever the…

4 wire fan and i'm not sure what to do about the blue and yellow wires

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