Not doing so much other than email, youtube and some primitive photo and video editing, I decided it was time to reduce the power consumed by the Hack.
The first move was to remove the 2GB GT610, which is a very nice graphics card, however, I am not sure if my system profited from this card in any way.
The second step was to replace the USB studio monitors by regular active PC speakers. The incentive of doing that is that those speakers do not draw the amount of current required to be linear (the studio monitors got quite warm over time) and additionally, the PC speakers are not influencing USB, i.e. not waking up the Hack when switched off.