I put that extra 80mm fan I found, and plugged the 3-pin into a 3-pin slot next to the ATX power connector, and it won't work. It says PWR_FAN next to it. And in the BIOS it's reporting 50k-60k rpms, which has to be a mistake. What happened here? Does this have to do with the fan originally being in a 3-pin slot saying CPU_FAN next to it, in the old computer I found it off of?
3770K | ASUS STRIX GTX 1080 | DDR3-1600 16GB | CORSAIR 650D | CORSAIR HX 850W | CORSAIR H100 | SOUND BLASTER Z | ASROCK EXTREME4 GEN3