We show energy consumption based on the entire PC (motherboard/processor/graphics card/memory / SSD). This number depends on and will vary per motherboard (added ICs / controllers / Wi-Fi / Bluetooth) and PSU (efficiency). Remember that we measure the ENTIRE PC, not just the processor’s power consumption. Your average PC can differ from our numbers if you add optical drives, HDDs, soundcards, etc.
Power consumption measurements will differ per PC and setup. Your attached components use power, but your motherboard can also have additional ICs installed, like an audio controller, 3rd party chips, network controllers, extra SATA controllers, extra USB controllers, etc. These parts all consume power, so these results are a subjective indication.