The Xbox Series X is quoted (opens in new tab) as using 153W power during active gameplay. If we take recent averages from electricity costs (opens in new tab) into account then you’re roughly spending 2.26 cents/ph (with the console going full speed). In the UK, however, those rates jump to 5.20 pence/ph. If the average (opens in new tab) Xbox Series X user played their console for two hours every day for a week, then that’s a total of 31.64 cents in the US and 72.83 pence in the UK. The console when used in standby mode draws 0.5 W, which is substantially more power efficient than the 13W of Sleep Mode.
An energy-saving mode that takes the strain off the console’s RDNA 2 GPU could see the wattage per hour significantly reduced. The AMD graphics that power the Xbox Series X, a custom-engineered Scarlett processor, is technically capable of delivering up to 200W TDP on a 320-bit memory bus. Undervolting is certainly possible with this hardware, where less power means decreased performance, as graphics cards utilizing the hardware can do, especially in the best gaming laptops. As for how much this will impact gaming performance, that remains to be seen should this update come to fruition.