SoC Performance

While we’re ready to move on to newer benchmarks for 2016, our system performance benchmarks from 2015 are still going to provide a pretty good idea for what to expect from the Galaxy S7 and Snapdragon 820 by extension. For those that are unfamiliar with what the Snapdragon 820 is, I’d reference our previous articles on the Snapdragon 820.

In essence, we’re looking at a 2x2 CPU configuration with 2.15 GHz Kryo cores for the performance cluster, and 1.6 GHz Kryo cores for the efficiency cluster. Binding the two clusters together are some power aware scheduling at the kernel level and a custom interconnect to handle coherency between the two clusters. Memory is also improved relative to the Snapdragon 810, with a bump to LPDDR4-1866 over the former's LPDDR4-1600. Of course, there's a lot more to talk about here, but for now we can simply look at how the Snapdragon 820 compares in our benchmarks.

Update: As we've had a few questions on the subject, I just want to clarify browser testing. Samsung's stock browser was not included with our Verizon-branded sample phone, nor is it possible to install it at this time. As a result we are unable to test the performance of Samsung's browser. The Verge reports that this is a Verizon decision and that all Verizon phones will be shipping like this; so for these phones Chrome is the de-facto stock browser.

Kraken 1.1 (Chrome/Safari/IE)

Google Octane v2  (Chrome/Safari/IE)

WebXPRT 2015 (Chrome/Safari/IE)

Starting off with our web benchmarks, we can see that in the time since our initial testing of the Snapdragon 820 MDP there have been some major improvements to how well Chrome is optimized for Kryo. As a result we're seeing results that are almost comparable to Snapdragon Browser in Chrome.

Overall then the Galaxy S7 and its Snapdragon 820 SoC won't top the charts on web benchmarks - Apple still holds an edge here - however the Galaxy S7 puts up a solid fight. The one drawback here is that the Mate 8 and its Cortex A72 CPU seems to have the edge over the Galaxy S7.

Basemark OS II 2.0 - System

Basemark OS II 2.0 - Memory

Basemark OS II 2.0 - Graphics

Basemark OS II 2.0 - Web

Basemark OS II 2.0 - Overall

In Basemark OS II the combination of a better GPU, better NAND, and better single thread CPU performance seems to be enough for the Galaxy S7 to approach the iPhone 6s Plus in overall performance. While the system benchmark shows that Kryo isn't quite going toe to toe with Twister, the Adreno 530 helps to narrow the gap in the graphics test.

PCMark - Web Browsing

PCMark - Video Playback

PCMark - Writing

PCMark - Photo Editing

PCMark - Work Performance Overall

In PCMark, we can see that the Galaxy S7 is mostly comparable to the Galaxy S6. However major improvements in areas like GPU performance help to give it an overall advantage relative to the Galaxy S6 in the photo editing test. Given that this is basically a test of API-level performance, it's likely that Samsung's frameworks and governor settings lead to mostly similar performance in these tests.

Overall, the Snapdragon 820 appears to provide a pretty healthy bump in performance over almost every SoC seen in 2015, although it's hard to declare a clear winner when comparing it to Apple's A9 or Huawei's Kirin 950. If you glanced at the battery life graphs and the performance graphs above it's pretty obvious that Qualcomm has made some enormous strides here. While not quite going from zero to hero, Qualcomm has come close, and that definitely deserves some credit.

NAND Performance

If you think about the memory hierarchy, while RAM and cache are important, at the end of the day the most important aspect is the base storage. Even if you have infinite RAM and cache, if your storage is sufficiently slow the user experience is going to be painful for at least the first time you have to load something.

In order to test this, we use our standard test of AndroBench with 4 KB and 256 KB reads and writes for random and sequential tests. I went ahead and did some digging around to figure out exactly what it is we’re testing in the Galaxy S7, and it turns out that while the Galaxy S7 storage solution is similar to what’s in the Galaxy S6 and S6 edge, it isn’t quite the same. The Galaxy S7 UFS storage identifies itself as the KLUBG4G1CE-B0B1, which looks to be in the same family and appears to have been released at pretty much the same time as the Galaxy S6 storage solution, but the model number isn’t quite the same.

Internal NAND - Sequential Read

Internal NAND - Sequential Write

Internal NAND - Random Read

Internal NAND - Random Write

Looking at the performance results, we can also see that the Galaxy S7 is pretty similar to the Galaxy S6 in storage performance at a high level. Interestingly enough despite using full disk encryption on the Galaxy S7, we don’t really see a noticeable degradation in performance relative to the Galaxy S6 which is good to see considering the number of Android devices that do have noticeable performance effects when enabling FDE.

Battery Life GPU Performance
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  • bodonnell - Tuesday, March 08, 2016 - link

    Any chance you'll be doing an in depth review of the Exynos 8890 equipped model. I would really like to see an in depth review that compared it to the SD820. Preliminary benchmarks seem to suggest it is comparable in the CPU department but behind in the GPU department. Since it looks like us Canadians will be getting the Exynos variant I'd like to see if we'll actually notice a difference in everyday use... Reply
  • tipoo - Tuesday, March 08, 2016 - link

    That's really strange! Usually it's NA vs world, but why would Canada get Exynos while the US gets SD820? Reply
  • bodonnell - Tuesday, March 08, 2016 - link

    It is pretty odd as Samsung usually ships the same hardware to both Canada and the US. It seems in this case they are only shipping the SD820 version in CDMA markets and since Canada is all GSM we are getting the Exynos version. I don't know that this has been 100% confirmed yet though, that's just what the rumour mill is saying. Reply
  • phoenix_rizzen - Monday, April 11, 2016 - link

    It's true, the Canadian version uses the Exynos 8890 SoC (as shown by CPU-Z, and CPU Spy on this Telus S7). Reply
  • zeeBomb - Tuesday, March 08, 2016 - link

    OMG...! JOSH!!! you made my dreams come true with a blessed review. Reply
  • nathanddrews - Tuesday, March 08, 2016 - link

    Still completely stupefied as to Samsung's (and Google's) decision to continue with this whole black text on white background thing, knowing full well the OLED consumes more power when pushing white. Also, it's ugly. Reply
  • Qwertilot - Tuesday, March 08, 2016 - link

    Less net area of text than background, surely? Reply
  • theduckofdeath - Tuesday, March 08, 2016 - link

    It's less straining for your eye to read black text on white (which is why you'rereading this in black on white right now :D ). Also, the brightness of the system settings is to be fair completely irrelevant in the long run. Once you've tinkered with whichever settings you prefer, you rarely ever go into those menus again. Making the UI look consistent clearly has a bigger weight in that design choice. Reply
  • WagonWheelsRX8 - Tuesday, March 08, 2016 - link

    Pretty good write-up.
    I have one request: In your charts, can you put the SoC powering the device (in smaller letters) underneath the name of the device? It would be helpful to understand why a device performs like it does (is it SoC related or subsystem or software), and it's pretty standard info in PC based reviews. Otherwise, keep up the good work!
    Reply
  • foneAddict - Tuesday, March 08, 2016 - link

    Please Please Please can you do a review of the Exynos 8890 variant. I have a sneaky suspicion battery life on this SoC will be significantly better than SD820.

    Great review as always. Looking forward to part deux :-)
    Reply

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