The rig turns of, the GPU powers down but Ampinel stays on and ends up going in alarm because it doesn't sense the GPU.
when you power off your system, your psu have to
switch off the 12V supply. (the 12V2X6 Connector) when the 12V is off, the ampinel is OFF.
This
is no issue with the ampinel, this is an issue from your PSU oder mainboard.