Outside of OEM and aftermarket air coolers, I've only ever used some Corsair AIOs. The Corsairs would have fans that plugged into the cooler. Nice and easy. On my latest build I used an Alphacool Eisbaer 360 - plugged the CPU fans into the CPU fan 4 pin on the mobo (and plugged the CPU pump into the CPU2 / water pump 4 pin). This is on a Taichi X470 with latest bios. Everything works but it seems like the AIO fans that are plugged into the CPU cooler 4 pin on the mobo are being driven at max / buzzsaw / airplane takeoff speeds. I've tried adjusting the fan speeds manually in the bios but it doesn't seem to make any difference at all - could be user error but I've checked / doublechecked / RTFM. Anyone have any suggestions / pointers / tips / tricks? Thanks!