"EPRI discovered that when the consoles were used for playing the same game for one hour of activity the PlayStation 3 used an average 84.8 watts, the Xbox 360 used an average of 87.9 watts and the Wii used an average of 13.7 watts.
EPRI took the energy data further, noting the Nielson Companys estimate that the heaviest gamers use their consoles for 5 hours and 45 minutes today. When added up, that makes the energy usage of the Xbox and PlayStation 184 kilowatt hours and 178 kilowatt hours respectively close to that of a washing machine, and the Wiis consumption 29 kilowatt hours close to that of a linear fluorescent light, like those in office buildings."
Mark McGranaghan, vice president of Power Delivery & Utilization for EPRI, also stated that the reason that the PlayStation and Xbox 360 used more energy due to having more powerful graphics processors compared to the Wii's. The study did mention, though, that all three systems currently use less power than earlier versions.
"Consumers have become increasingly aware of how much electricity their household electronics consume, whether in active use or when the hardware is in standby mode. While the overall trend is toward more efficient electronics, these tests clearly show that if youre a power-conscious consumer you may want to ask questions or check more closely," said McGranaghan.
Information via EPRI and Inhabitat; image: Inhabitat.