Question How measure the power consumption?

[Dehlia]

Are there any apps that can tell the power usage when the pc is runnig or is the only option to use a clamp meter from the outside?

 

[In2Photos]

P3 P4400 Kill A Watt Electricity Usage Monitor https://a.co/d/3mzpg5b

 

[BoomerD]

Kill-a-Watt works pretty nicely for me as well.