Fan Control Guide Intel Z270 Motherboard Edition Tweaktown
CPU Fan is fixed to the CPU heatsink, while CPU OPT is used only for one heatsink greater in size On the one side where the CPU fan's main work is to cool the system by the primary fan, the CPU OPT has more than one fan and can name coolers and radiators too ( CPU FAN can be connected to a cooler)Does operate as fan so manual isn't wrongits just always 100% 1 level 1 Sprungnickel 2y I thought cpu opt was for a dual fan cpu cooler so same as cpu fan plug I have a none PWM fan plugged in there for top of case and it's not at 100% all the time so