Specifically what was happening was this... The systems were running cool, so the fans would spin down to a low rpm and the system would then throw a low rpm threshold alert and spin the fan back up.When this occurs the system switches into some sort of "Critical Cooling Mode" and spins all the fans up to 100% for a few seconds. Rinse and repeat a few dozen times and you hear what almost sounds like an intoxicated neighbor playing with his new weedeater.