System Energy Loss: When Cool’n’Quiet Mode Doesn’t Function
The complete system’s energy loss is similar to that of all the different CPUs. But additional losses occur with motherboard components like the Northbridge and voltage regulator, because when higher processor clock rates and increased computing power is demanded, more voltage is required, and therefore more power.
Our test system needs up to 24.5 watts more without Cool’n’Quiet mode; in the worst case, the motherboard needs about 3 watts more. Even when the PC is not being used, a lot of energy is wasted if the energy saving function is not available. This can be compared to room lighting generated by energy saving bulbs. The BE processor’s losses are not substantial, at 4.7 watts.