Silent Scone wrote:
If it's only a concern when the system is powered down, then simply turn off at the wall. This is what I do at night if not intending to use sleep states.

Alternatively you could just mask them on with some tiny removable stickers or a tiny slice of masking tape, if it's just the leds' light that bothers you.
I̶ ̶d̶o̶n̶'̶t̶ ̶k̶n̶o̶w̶ ̶i̶f̶ ̶y̶o̶u̶ ̶c̶o̶u̶l̶d̶ ̶d̶i̶s̶a̶b̶l̶e̶ ̶t̶h̶e̶ ̶p̶o̶w̶e̶r̶ ̶l̶e̶d̶s̶ ̶t̶h̶r̶o̶u̶g̶h̶ ̶t̶h̶e̶ ̶E̶r̶p̶,̶ ̶b̶e̶c̶a̶u̶s̶e̶ ̶i̶t̶'̶s̶ ̶d̶i̶r̶e̶c̶t̶ ̶c̶o̶n̶n̶e̶c̶t̶i̶o̶n̶ ̶b̶e̶t̶w̶e̶e̶n̶ ̶t̶h̶e̶ ̶P̶S̶U̶ ̶a̶n̶d̶ ̶t̶h̶e̶ ̶p̶o̶w̶e̶r̶ ̶c̶i̶r̶c̶u̶i̶t̶r̶y̶ ̶o̶f̶ ̶t̶h̶e̶ ̶G̶P̶U̶ ̶a̶n̶d̶ ̶i̶s̶ ̶n̶o̶t̶ ̶c̶o̶n̶t̶r̶o̶l̶l̶e̶d̶ ̶b̶y̶ ̶t̶h̶e̶ ̶m̶o̶t̶h̶e̶b̶o̶a̶r̶d̶.̶

Enabling ErP Ready in the BIOS solved my problem.

Many thanks.

Great, I never noticed that little LED until I read this thread. 😛