I have another that I selected as a small 24x7 server and it's under 50 Watts. However, it was designed to be light on the energy draw.
Other PCs I'm sure are under 100 Watts.
So for the numbers I'd use 200 Watts.
Can anyone advise me what the average hourly power consumption of a desktop computer would be if left running when not in use ( monitor is switched off). I appreciate this would vary from model to model and would only expect a ballpark figure, there is nothing to indicate the consumption in the manual or any labelling on the computer stating the wattage. I do tend to leave it running continuously and with ever increasing power costs I am interested what I could save if it was switched on only when in use.