Power Consumption

As always I ran the Xbox One through a series of power consumption tests. I’ve described the tests below:

Off - Console is completely off, standby mode is disabled
Standby - Console is asleep, can be woken up by voice commands (if supported). Background updating is allowed in this mode.
Idle - Ethernet connected, no disc in drive, system idling at dashboard.
Load (BF4) - Ethernet connected, Battlefield 4 disc in drive, running Battlefield 4, stationary in test scene.
Load (BD Playback) - Ethernet connected, Blu-ray disc in drive, average power across Inception test scene.
CPU Load - SunSpider - Ethernet connected, no disc in drive, running SunSpider 1.0.2 in web browser.
CPU Load - Kraken - Ethernet connected, no disc in drive, running Kraken 1.1 in web browser

Power Consumption Comparison
Total System Power Off Standby Idle Load (BF4) Load (BD Playback)
Microsoft Xbox 360 Slim 0.6W - 70.4W 90.4W (RDR) -
Microsoft Xbox One 0.22W 15.3W 69.7W 119.0W 79.9W
Sony PlayStation 4 0.45W 8.59W 88.9W 139.8W 98.0W

When I first saw the PS4’s idle numbers I was shocked. 80 watts is what our IVB-E GPU testbed idles at, and that’s with a massive 6-core CPU and a Titan GPU. Similarly, my Haswell + Titan CPU testbed has a lower idle power than that. The Xbox One’s numbers are a little better at 69W, but still 50 - 80% higher than I was otherwise expecting.

Standby power is also surprisingly high for the Xbox One. Granted in this mode you can turn on the entire console by saying Xbox On, but always-on voice recognition is also something Motorola deployed on the Moto X and did so in a far lower power budget.

The only good news on the power front is really what happens when the console is completely off. I’m happy to report that I measured between 0.22 and 0.45W of draw while off, far less than previous Xbox 360s.

Power under load is pretty much as expected. In general the Xbox One appears to draw ~120W under max load, which isn’t much at all. I’m actually surprised by the delta between idle power and loaded GPU power (~50W). In this case I’m wondering if Microsoft is doing much power gating of unused CPU cores and/or GPU resources. The same is true for Sony on the PS4. It’s entirely possible that AMD hasn’t offered the same hooks into power management that you’d see on a PC equipped with an APU.

Blu-ray playback power consumption is more reasonable on the Xbox One than on the PS4. In both cases though the numbers are much higher than I’d like them to be.

I threw in some browser based CPU benchmarks and power numbers as well. Both the Xbox One and PS4 ship with integrated web browsers. Neither experience is particularly well optimized for performance, but the PS4 definitely has the edge at least in javascript performance.

Power Consumption Comparison
Lower is Better SunSpider 1.0.2 (Performance) SunSpider 1.0.2 (Power) Kraken 1.1 (Performance) Kraken 1.1 (Power)
Microsoft Xbox One 2360.9 ms 72.4W 111892.5 ms 72.9W
Sony PlayStation 4 1027.4 ms 114.7W 22768.7 ms 114.5W

Power consumption while running these CPU workloads is interesting. The marginal increase in system power consumption while running both tests on the Xbox One indicates one of two things: we’re either only taxing 1 - 2 cores here and/or Microsoft isn’t power gating unused CPU cores. I suspect it’s the former, since IE on the Xbox technically falls under the Windows kernel’s jurisdiction and I don’t believe it has more than 1 - 2 cores allocated for its needs.

The PS4 on the other hand shows a far bigger increase in power consumption during these workloads. For one we’re talking about higher levels of performance, but it’s also possible that Sony is allowing apps access to more CPU cores.

There’s definitely room for improvement in driving down power consumption on both next-generation platforms. I don’t know that there’s huge motivation to do so outside of me complaining about it though. I would like to see idle power drop below 50W, standby power shouldn’t be anywhere near this high on either platform, and the same goes for power consumption while playing back a Blu-ray movie.

Image Quality - Xbox One vs. PlayStation 4 Final Words
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  • PhatTran - Friday, November 22, 2013 - link

    My sincere advice is you should buy a PS4 now. Why? You can see here: http://lovingtheclassicsreviewsite.net/trend/6-rea...
  • lilkwarrior - Friday, November 22, 2013 - link

    It is a shame hearing about the reported use of SATAII and the lack of 802.11ac from both consoles.

    Given some of the title of the game are over 40GB in size, something tells me that'll need to be addressed with the inevitable XboxOne Slim and PS4 slim models that'll come out about 2-3 years from now.

    Especially Microsoft odd stance on not allowing the hard drive to be removed. PS4 wireless limitations are sort of an odd decision given the stigma of their PSN network being slower and unresponsive; any help from the hardware to be at current standards and future-proof.

    Excluding China obviously, some of the fastest broadband infrastructures in the world (i.e. South Korea) are based in Asia. I would think that they would have at least took Microsoft's route to have a dual-band 802.11n connections being available to them.

    It's weird that even Sony's standard phones connect and download to the internet using WiFi faster than their flagship console. It makes little sense.

    Disappointed I'll have to wait this gen out for 2-3 years. By then, hopefully the ripple effect of SteamOS, Steam Controller, G-Sync, Mantle, Oculus Rift, 4K gaming, and so on will be evident enough to even consider buying either console outside of exclusives.
  • lilkwarrior - Friday, November 22, 2013 - link

    *any help from the hardware to be at least accommodate common American wireless speeds and be a bit more future-proof would have been helpful to improve the perception of PSN for Sony.
  • vol7ron - Friday, November 22, 2013 - link

    In the Gravity demo, 0:02s in. It was interesting to see the difference in the astronaut falling.

    To me, it appeared that the 360 had higher contrast, but there were also other inconsistencies. A black bar ran across the leg of another astronaut in the scene -- I suspect this was debris -- but more notably the 360's face shield was blacked out, whereas the XB1 showed the astronaut's full face.

    In terms of quality, due to the higher contrast, it actually seemed like the 360 won out there. However, as expressed, in all the other scenes despite brighter lighting, the XB1 had much better detail and noticeable edges -- the 360 was much softer and less defined.

    What I don't understand is the naming convention. Why XB1? It's not the first XBox,
  • Blaster1618 - Friday, November 22, 2013 - link

    No Minecraft yet on PS4, thats a deal breaker for our family. I want to drive a Mclaren P1.
  • blitzninja - Saturday, November 23, 2013 - link

    All this talk about specs and even the "higher spec console loses the war" non-sense is so stupid, just stop.

    You guys here on AnandTech need to realize that you live in your own little bubble and while you may know a lot about the consoles, the casual consumer market (which makes up most people) have different priorities. So why did Nintendo products beat it's competitors with the Wii while having horrible specs? The experience.

    Yes, there is a performance difference between the PS4 and the XO but what really matters is how the console feels and does what people want it to do. This is where the Wii comes in (the Wii U was a flop because they actually went backwards in this regard). Most of the console market is made up of casual gamers. Casual gamers like to invite their friends over and have a LAN party or party game, play with their family (this includes younger audiences), watch movies together and play music at times. The Wii dominated the market because of it's new control interface(s) that added the missing point to this market, it was extremely versatile and made playing it all that more fun than the other consoles.

    This is why Nintendo didn't really beef up the Wii U, they just added the extra power to allow for more advanced and precise gesture computation.

    So why isn't the Wii U dominating again? Well for starters, most people who have a Wii are satisfied with it and are not out to buy a new one, the Wii U doesn't add anything spectacular that would make the majority of it's target market want to upgrade.

    The reason the higher spec console ended up losing is because when the company developed the console, they focused their resources on the performance and as a result cut back on the usability and experience aspect. But that isn't necessarily the case, it all depends on what the focus experience of the console is (the market) and how well polished that experience is.

    If Microsoft want's to win the war it needs to pander to the needs of the casual market, not to say it should copy Nintendo but it has another market. The all-in-one market, that is to say make the XO a future PVR, set-top-box, media/streaming centre. Replace the HTPC with a low cost alternative. Most descent HTPCs fall into the $500-$700 market for those who want some light gaming too. The XO would absolutely destroy this market with the proper hardware and software support. Being a console for mid-high end gaming while still being a multimedia powerhouse that does a multitude of things. This includes the voice recognition, a killer feature, if done right.

    If I could say "latest episode of the walking dead" or some other show and it worked, then gg Sony, you just got rolled.

    @AnandTech: Fix your forum/comment software, not having an edit button is really annoying
  • Hixbot - Sunday, November 24, 2013 - link

    The Wii dominated sales at first, they captured a market of casual gamers that otherwise wouldn't have a bought a console. That market didn't buy many games, attach rate and they grew tired of the Wii, with all the smartphone and Facebook games etc.
    The Wii sales slumped, and in the end, x360 and PS3 each surpassed it in total by 2012.
    For us hardcore gamers who also are Nintendo fans, the Wii was bought but it then left a bad taste in our mouths. The outstanding titles were few and far between, and the rest was shovelware. True motion control never really materialized in many games, most just made use of a "waggle" gimmick.
    Wii-u comes out, casual gamers have already moved on, and the hardcores are reluctant to jump into another gimmick "tablet" just for the Nintendo software.

    Disclosure: As a big N fan, I bought a wii-u for the Nintendo 1st party titles. Others like me are the only people buying this thing.
  • Exodite - Saturday, November 23, 2013 - link

    Thanks for the mini-review, much appreciated! Some interesting technical information no doubt.

    Personally I'm more keen on the PS4, primarily due to having good experiences with Sony equipment in general as well as the price. We currently have a Sony BluRay player (the BDP-470S) and I'd have loved to replace it with a gaming-capable alternative (that also does Netflix) but alas that's unlikely unless Sony can squeeze in CD, MP3 and most importantly DLNA support in the machine.

    Anyway, I'm also concerned about the sound levels of the machines as I have quite sensitive ears and I find even my current BluRay player to be something of a hair dryer when playing back discs. BD discs in particular.
  • ol1bit - Saturday, November 23, 2013 - link

    That was an awesome mini review! One of the best review's I've read about these new titans.

    'm really surprised that 8 year old 360 hardware is as close as it is! A tad old now, but a great book to read on the old hardware is "The Race for a New Game Machine". This book really shows how MS pulled some fast ones on Sony and ended up with the better plan.

    This time looks like Sony really kept everything under wraps better and has at least a slight upper hand. There is no way MS can make it's hardware better/faster at this point. Good Enough? Maybe...Time will tell.
  • nerd1 - Saturday, November 23, 2013 - link

    It's funny that those 'next gen' consoles are actually on par with some gaming laptops and nothing better. PC is the best gaming console again.

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