We test power consumption at the socket with a calibrated meter under the following conditions.
1: when idle
2: running Tomb Raider at Ultra HD 4K with ‘ultimate' image quality settings.
The monitor is not factored into the power draw, just the demand via the system power supply.
The system consumes 122 watts when idle, this seems higher than normal, but it is related to the core voltage increases and overclocked state of the processor. When gaming, this rises to 290 watts.