Power Usage

There’s a lot of performance on tap in the Xbox One X, which never comes with no strings attached. Like the Xbox One S, the APU inside is built on TSMC’s 16 nm FinFET process, which should help keep power usage under control. In addition, the Xbox One X is outfitted with a power supply that Microsoft equates to an 80 Plus Gold unit, which means it should be 90% efficient at 50% load with a 115 V source, and there shouldn’t be too much extra power wasted from the PSU converting AC voltage.

There’s several scenarios we tested for power usage:

Off – Xbox One X is powered off in Energy Savings mode, which means standby mode is disabled.

Standby – Xbox One X is powered off in Instant-On mode, which allows background updating and voice activation enabled (if supported).

Idle – Ethernet connected, no disc in the drive, system idling at dashboard.

Load (UHD BD Playback) – Ethernet connected, UHD Blu-Ray disc in the drive playing Planet Earth II, compared to The Hobbit on Blu-Ray on the original Xbox One.

Load (GoW4) – Ethernet connected, no disc in the drive, playing Gears of War 4 in UHD/HDR.

Load (The Wolf Among Us) – Ethernet connected, no disc in the drive, playing The Wolf Among Us in FHD SDR.

We’ve been able to compare against the original Xbox One, although not the S model as we didn’t have one on hand. The Wolf Among Us was chosen as an older game which caps at 1080p and SDR, and Gears of War 4 shows the power draw at full 4K HDR rendering. The comparison against the original for this game will of course be for the 1080p version though, since that’s the max it supports.

Power Consumption Comparions
Total System Power Energy-Saving Instant-On Idle Load (UHD BD) Load (GoW4) Load (The Wolf Among Us)
Xbox One < 2W 14.2W 53W 80W 107W 102W
Xbox One X < 1W 10W 56W 64W 172W 101W

As with the original Xbox One, when Instant On is disabled, the console is practically fully off. There’s a small amount of draw, but overall, not very much. Most people that use the console are going to likely want it in Instant On mode though, so games and the console can update while the system is off, as well as to provide a much quicker startup time, and games can remain loaded in RAM. In Standby mode, power draw is reasonable at 10 W, which is lower than the original console when it first launched. It’s still a fair bit of power, but when you factor in that it needs to keep 12 GB of GDDR5 memory powered up (among other things), it is not unreasonable to expect this amount of power draw.

Idling at the dashboard draws around 55 W, and to add to that, most non-gaming tasks don’t add very much to this total, if any. If you’re using your Xbox to passthrough HDMI from a cable box, it will take this same power draw. Maybe this would be an impossible pipe dream, but it would be nice to see the Xbox One also pass through HDMI when it is in Standby mode.

Playing back a UHD Blu-Ray (standard Blu-Ray on the original Xbox One) was a tiny bit higher than idle, which is good to see. Some of the draw would be the disc drive itself, but a lot of the playback would be offloaded to fixed function hardware in the media block so it’s not surprising to see it so close to idle.

Clearly gaming on older Xbox One games is not much of a chore for the Xbox One X, since the power draw is only about 50 W over idle. But, when gaming with an Xbox One X Enhanced title, such as Gears of War 4, the power draw jumps significantly to 172 W as the peak observed. This is quite a jump over the original console, and makes the cooling system, which is barely audible even under these loads, even more impressive. Compared to a high-end gaming PC though, the power draw is quite a bit less.

Enjoying Media User Interface
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  • Rainbird01 - Friday, November 3, 2017 - link

    The 4/8 memory split is actually wrong, since Microsoft changed it to 3/9 a while back. See http://www.eurogamer.net/articles/digitalfoundry-2... Reply
  • alistair.brogan - Friday, November 3, 2017 - link

    yes the downside was a 1080p interface even for the xbox one x, but they reserved more of the memory for games Reply
  • Brett Howse - Friday, November 3, 2017 - link

    Fixed! Didn't realize they changed it but that's what happens when they announce things like this in tweets :) Reply
  • "Bullwinkle J Moose" - Friday, November 3, 2017 - link

    Will Microsoft EVER have a custom version of Win 10 like the "Windows on Arm" that will boot to this console from a USB SSD or Thumb Drive?

    and what exactly is the USB? 3.0? 3.1?

    and what formats of Audio and Video media can be played from an external USB device?
    Reply
  • "Bullwinkle J Moose" - Friday, November 3, 2017 - link

    I meant USB Gen1 or Gen2 ? Reply
  • bill4 - Friday, November 3, 2017 - link

    You made an small error/typo, Xbox One original clocks in at 1.31 teraflops, not 1.23. You're not accounting for the late overclock it got from 800mhz to 853 mhz. Reply
  • Ryan Smith - Friday, November 3, 2017 - link

    Right you are. Thanks! Reply
  • jabber - Friday, November 3, 2017 - link

    The main problem with the XBox One was the Project Head was not a console guy. He was a playboy multi-millionaire on a win win contract to boost his ego. Hence he quit a few days after release with a bundle of cash.

    The main problem with Windows 8 was the Project Head was not a OS guy. He was a playboy multi-millionaire on a win win contract to boost his ego. Hence he quit a few days after release with a bundle of cash.

    Boy MS was in a mess a few years ago. I always say give critical projects to the guy who has something to lose if it all goes wrong. You tend to get more focus and better results.
    Reply
  • B3an - Friday, November 3, 2017 - link

    Error in article? Says it has 8GB memory available to devs, but wasn't that later increased to 9GB? Reply
  • beginner99 - Friday, November 3, 2017 - link

    I wonder why MS did not go with eDRAM as a cache for Xbox One. Like intel Iris pro. That would not have posed the limitations on the SOC size and would not have needed specific developer effort. Reply

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