Hello,
thank you for the prompt response.
I am not 100% sure as well of what an INA sensor is, but I think that it is a current monitor (e.g. INA169 data sheet, product information and support | TI.com). Anyway, my manpage shows this information (I’m using CentOS 6.7):
Power Draw
The last measured power draw for the entire board, in watts. Only available if power management is supported. This reading is accurate to within +/- 5 watts. Requires Inforom PWR object version 3.0 or higher or Kepler device. Please note that for boards without INA sensors, this refers to the power draw for the GPU and not for the entire board.
You said that there is a 5% error, you meant 5 Watts (as described in the manpage)?
Once again, thank you for your help.