globus0619 wrote: if I have a 500W power supply, it takes me 500W per hour or is there any other converter
It consumes as much as the equipment connected to it needs at the moment + losses on the efficiency of the power supply itself, the higher its efficiency, the less energy it consumes.
The energy consumed mainly depends on the power consumption of the computer's components and the way it is used. In "rest", for example, displaying only the desktop, a typical set from the socket will take 70-90W, during high loads 200-250 or even 300W, but it all consists of both the PC configuration and the efficiency of the power supply. There are sets that, even when loaded, do not exceed 100W.
This can be compared to such a situation, if the car's engine reaches, let's say, 200KM at 6000 rpm, do you drive non-stop at such high revolutions from the very start? No, as a rule, the RPM is used in the range of 2000-3500RPM and the engine power and fuel consumption are lower then, but you can of course also use these 200KM and push 180km / h with a fuel consumption of 15L per 100km, which is not economical. If you "use" computer hardware to a large extent, the consumption from the network is similarly higher.
