With part one of our Galaxy S7 review, it was clear that the Galaxy S7 was at least a mild improvement to the Galaxy S6 in some ways, but there were still many areas to investigate. At the time, we were in the middle of transitioning to our new 2016 benchmark suite, which meant that it was necessary to re-test the Galaxy S7.

Our 2016 benchmark suite attempts to really push our testing in general to a new level of depth and more importantly, more focused on the overall user experience. When reflecting upon the value of AnandTech from a testing perspective, it’s clear to me that while part of our value is running benchmarks across a wide range of phones, another part of our value is being able to run tests that others wouldn’t be able to run at all.

With our new test suite for 2016, our extended suite of benchmarks attempts to focus on the latter to go deeper in reviews in a meaningful way. I definitely enjoy examining architectural details through microbenchmarks, but for general reviews our standard test workflow needed to be focused on user experience in a deeper way. With this in mind, we can get into the data that we were missing with part 1 of the review. Of course, if you haven’t read part 1 of the Galaxy S7 review, I highly recommend reading it first just to get a better introduction into the basics of the Galaxy S7.

Battery Life

Of course, now that we have our full suite of benchmarks we can start to look over in detail how devices perform. While we’ve gone over some of the results before it’s probably fair to say that our discussion of battery life on the Galaxy S7 was woefully incomplete with part 1 of the review. It’s also worth noting that internally we were still working on our 2016 web browsing test at the time so it wasn’t necessarily complete and sufficiently consistent and accurate. In the time since, we’ve been able to get all of the bugs ironed out and get a test that provides useful data that our previous tests didn’t.

As battery life is a critical part of our testing, it’s important for us to get this right, and in order to get useful relative comparisons we have to make sure that every device is tested in the same manner to avoid bias in one way or another. In order to achieve this, all devices have all possible background services disabled, as well as sync and automatic app updates. In order to try and make an even comparison we also set the display to 200 nits brightness on a 100% average picture level display, also known as a blank white screen. However, one area that we aren’t necessarily able to control for 100% of the time is ambient temperature, device orientation, or material contact. While tests that don’t reach TDP limits won’t see any effects, TDP-limited tests will see a delta here, but it’s hard to estimate just how much of an impact exists here.

Web Browsing Battery Life 2016 (WiFi)

With this baseline in mind we can move on to the actual results. As seen in the chart above for WiFi web browsing on our new test it’s worth mentioning that the data here has changed as changes to the test have affected results, generally bringing battery life down or keeping it around the same. The Galaxy S7 does fairly respectably here, although the Snapdragon 820 version is definitely showing either architectural or implementation inefficiency here when compared to the Exynos 8890. A delta of about 10% means that the Exynos 8890 GS7 uses about 1.38W average here while the Snapdragon 820 GS7 uses about 1.51W in this test assuming that the battery capacity is nominal. If you subtract out an estimated display power the delta that can be attributed to non-display factors is something like 30% here. Interestingly, the HTC 10 is mildly more efficient here with its higher density LCD, with the AMOLED display consuming something like 10% more power despite the presence of dark-themed webpages to try and bring some balance here. The Galaxy S7 edge is pretty much the top here, but achieves its battery life through sheer battery size rather than efficiency.

Web Browsing Battery Life 2016 (LTE)

Moving on to LTE we can really start to see the battery life advantage that the Snapdragon 820 brings. It turns out that as a communications company, Qualcomm is good at making radios. One of the most obvious ways that this shows is in power, as the Snapdragon 820 basically has the same battery life whether you’re on LTE or WiFi, which isn’t necessarily the case with other devices. Unfortunately, we haven’t been able to test the Galaxy S7 with Exynos 8890 in comparable conditions for LTE so we can’t really see how power of the S820 modem compares with the Exynos’ Shannon modem, but we continue to see that the Galaxy S7 S820 is a bit behind the HTC 10 in battery life due to the use of an AMOLED display in high-APL workloads. However, the difference is nowhere near what it was in the past, and is close enough to not really make a huge difference. The Galaxy S7 edge performs well here, but on the basis of its battery size rather than efficiency.

PCMark - Work Battery Life

In the interest of not just relying on our own web browsing tests to try and get a handle for what battery life is like in general purpose compute situations, we continue to use PCMark’s battery life test to see how performance is in a benchmark that doesn’t attempt to equalize the amount of work done per unit time. Here the Galaxy S7 actually seems to be a fair bit better than the HTC 10, but this is likely due to the previously mentioned binning differences and some differences in governor as the delta in power and performance isn’t really all that much. The Galaxy S7 edge extends the lead here, again mostly due to the larger battery as the two devices are generally quite similar to each other.

Moving on to throttling performance we’ve transitioned to GFXBench’s Manhattan test on infinite rundown instead of T-Rex for this year as some devices from certain vendors have a tendency of reaching vsync on T-Rex which meant that it was difficult to see just how much throttling occurred over the duration of the test. After some testing it’s evident that for the most part throttling behavior is not necessarily changed by Manhattan either, so there’s not much need to retain T-Rex for high-TDP tests. Basemark OS II’s battery life testing is also rather questionable at this point, so we will no longer be reporting these scores as the methodology isn’t up to par with our expectations for 2016 and beyond.

GFXBench Manhattan 3.1 / Metal Battery Life

GFXBench Manhattan 3.1 / Metal Final Frame Rate

In the case of Manhattan, we continue to see some of the sinusoidal behavior seen in T-Rex throttling as it seems that Samsung’s throttling algorithms tend towards a more underdamped behavior than critically damped like HTC’s. However, for whatever reason it looks like the Galaxy S7 edge ends up with similar oscillating throttling behavior. Interestingly enough, even though the Galaxy S7 spends more time at higher performance states than the HTC 10, it manages to last longer, which is likely due to the lower APL of this content in conjunction with forced power save modes, and higher sustainable skin temperatures due to the glass back with heatpipe cooling to help distribute heat. Of course, the Galaxy S7 edge manages to last longer than either due to its larger size and battery.

Overall, the Galaxy S7 has decent battery life, while the S7 edge has great battery life due to its relatively large battery compared to its display size. The improvements here aren’t necessarily going to blow you away unless you get the Exynos 8890 variant, but it’s good to see that we’re finally back to improving on battery life with the launch of the Snapdragon 820 compared to the Snapdragon 810 and 808’s rather disappointing power efficiency due to the use of a high-power implementation and process node. I’m not sure the Snapdragon 820 is really the best design we’ve seen on 14LPP when it's more on par with 14LPE SoCs for efficiency, but it’s good enough that it doesn’t fundamentally compromise a device.

System Performance Revisited
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  • phexac - Tuesday, July 5, 2016 - link

    "I heard iphone sales are an all time low. Are you suggesting Apple is still selling more iphones than Samsung is selling their Galaxy series?"

    Yes, by a lot.

    Not to mentioned, that "iphone sales have declined for the first time quarter over quarter" does not mean "iphone sales are an all time low," which would imply that iphone sales are zero since there were no iPhones pre-2007.
  • retrospooty - Tuesday, July 5, 2016 - link

    "Yes, by a lot."
    - that is not correct. Samsung sells more phones than anyone. Samsung outsells Apple by a HUGE margin, not just a little. Apple sells the most of a single model, because they only have a few each year, but Samsung vastly outsells Apple in total, consistently every year without exception.
  • michael2k - Tuesday, July 5, 2016 - link

    The question was Galaxy vs iPhone, not Samsung vs iPhone. In terms of Galaxy S, their flagship phones are selling far fewer than flagship iPhones, per quarter. Not entirely sure about their entire Galaxy range, but Samsung doesn't sell many more phones than Apple in some quarters:
  • retrospooty - Wednesday, July 6, 2016 - link

    m2k, what are you even arguing here? Samsung outsells all other makers, consistently every quarter - always, without fail. They are huge. They are the Toyota of phones. FWIW, I dont think that is a good thing, but it is what it is and no amount of debate will change it.
  • KoolAidMan1 - Saturday, July 9, 2016 - link

    "Samsung sells more phones than anyone. Samsung outsells Apple by a HUGE margin"

    The majority of those phones are low end models, just like the rest of the Android ecosystem. If we're only comparing high end models like the GS6 and GS7 it is still far outsold by the iPhone. This is reflected in higher app revenue, higher web traffic, higher ad revenue, and so on coming from iOS as it always has.

    You are being intellectually dishonest as usual by omitting important information.
  • Ratman6161 - Tuesday, July 5, 2016 - link

    Not really true that they are "at an all time low". See: http://www.statista.com/statistics/263401/global-a...

    Growth rate is at an all time low but that's true of smartphones in general. Its the same reason that PC sales leveled off a couple of years ago. PC's became fast enough/good enough to the point where there was just no reason to replace the one I already have. Example: I've got an i7 2600K system I built when that CPU was new in 2011 and its still overkill for most of what I do. Likewise, when I got my Galaxy Note 5 last November, I finally had a phone that was fast enough for anything and everything I do. Unless what I do with a phone changes radically (which I doubt will happen any time soon) I'll have no reason to replace it until the hardware dies.

    As far as Apple selling more phones than Samsung, that has really never been true unless you only consider the US market. Globally, Samsung has always sold more. Even in the US, Android overall has greater market share than iOS. Apple is the largest single company because its got a lock on iOS where Android is spread out among many companies.
  • HardwareDufus - Tuesday, July 5, 2016 - link

    Huge Apple Bias. Evident by the fact there is not a single review of the Lumia 1520, the 'flagship' Windows phone for the better part of two years.

    However, I understand that and don't fault them for it. I just read each article predisposed to the idea that the writers are predisposed to favor the apple version of whatever they are reviewing. So be it.

    Anandtech objectivity slid about 2 years before Anand himself actually left. They're just mirroring the rest of the tech blogosphere.... writers/reviewers/editors have mouths to feed. Everybody is beholding to whoever is writing the check and each piece of content will reflect that. Our modern enlightened world. Same greed. Same game.
  • fanofanand - Wednesday, July 6, 2016 - link

    Anand (who I still admire) showed the way, shill long enough and you will land a cushy job in Cupertino.
  • dsumanik - Tuesday, July 5, 2016 - link

    Actually no.

    This site, like many other review sites, receives money directly, or indirectly for writing positive apple coverage, especially in the the articles of their fiercest competitors.

    Then marketing shills like you come on here and quote sales figures in the comment sections, again paid for directly, or indirectly by apple.

    Oh and instead of just making statements to justify your argument...heres proof:


    IOS is just a drop in the smartphone bucket, theres no internet BIAS, it's the author 100%.
  • michael2k - Tuesday, July 5, 2016 - link

    I wish Apple paid me for my posts.

    What you're seeing, as retrospooty correctly surmised, is that Anandtech is in fact biased, but not towards Apple or away from Samsung, but towards the readers that pay their bills via ad impressions and click through. What he wishes is that the site cater more towards him, even if he is a smaller part of the readership.

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