RB1100AHx2 power input vs power consumption

Hardware MikroTik hardware general
1

Hi,

i have a unit RB1100AHx2, but as what i can see from the system, the power consumption is 11.3w, but refer to the tech spec, it mentioned input power should min 12w.
i have do nothing with the psu, can i said this psu is under power ?

if then, can i just replace with 24vdc psu ?
RB1100AHx2-1.jpg
RB1100AHx2-spec.jpeg

2

Is it perfectly normal, seeing similar and lower figures on a already in production (5-20% CPU) for more than one year 1100AHx2 with the built-in (12V) PSU.