It's been an interesting day here in Barcelona as I've had the pleasure to get a hands-on with both LG's new flagship, the G5, as well as Samsung's new Galaxy S7. While Joshua's hands-on article was based on the Snapdragon 820 variant of the Galaxy S7 which we'll be seeing in US and likely Chinese markets, the samples here in Barcelona were European units based on Samung LSI's own Exynos 8890 processor. Without wasting too much time I quickly took a deeper look into one of the devices on display at the event to be able to find out some of the missing information that we've been lacking on the Exynos 8890.
High-End SoCs Specifications
SoC Snapdragon 820 Exynos 8890 Exynos 7420
CPU 2x Kryo@1.593GHz

2x Kryo@2.150GHz
4x A53@1.586GHz

4x Exynos M1 @
2.60GHz (1-2 core load)
2.29GHz (3-4 core load)
4x A53@1.50GHz

4x A57@2.1GHz
2x 32-bit
LPDDR4 @ 1803MHz

28.8GB/s b/w
2x 32-bit
LPDDR4 @ 1794MHz

28.7GB/s b/w
2x 32-bit
LPDDR4 @ 1555MHz

24.8GB/s b/w
GPU Adreno 530
@ 624MHz
Mali T880MP12
@ 650MHz
Mali T770MP8
@ 770MHz
14nm LPP
14nm LPP
14nm LPE

The Exynos 8890 employs Samsung's own designed Exynos M1 cores. The micro-architecture at a high level resembles ARM's big cores, but Samsung seems to have made quite a few changes and improvements when compared to ARM's designs. While by now I do have a quite good idea of what the Exynos M1 looks like, we'll be covering the topic more in-depth in a future article once we'll be able to gain better insight from our own unit for proper benchmarking and power measurements.

On the CPU side we find an 8-core SoC composed of 4x Cortex A53 cores running at up to 1.586GHz coupled with 4x Exynos M1 cores in a big.LITTLE configuration. The most surprising revelation was the fact that the M1 cores reach an extremely high clock of up to 2.6GHz. This represents quite a significant boost over some past rumors which had put expectations 2.3-2.4GHz maximum frequency range. The catch here is that the Galaxy S7's power management doesn't allow all four cores to run at this high frequency but rather only enables the maximum clock when there's at most 2 cores loaded. If there are 3 or more cores under high load, the CPU frequency doesn't surpass 2288MHz.

On the GPU side we knew that we'd encounter a new ARM Mali T880MP12 - the currently largest Mali implementation available among existing SoCs. Back in November I theorized that Samsung would use the larger core implementation to lower the clocks of the GPU block and thus achieve better power efficiency. Indeed that's what seems to have happened as the Exynos 8890's GPU peaks at 650MHz versus the 770MHz frequency for the Exynos 7420. Hopefully this means that the new SoC will be able to maintain its peak performance for longer periods of time.

Google Octane v2  (Chrome/Safari/IE)

Kraken 1.1 (Chrome/Safari/IE)

While I didn't have the time to run too many benchmarks, I did manage to run a few of our basic browser tests as well as GFXBench. We haven't had the opportunity to benchmark the Snapdragon 820 Galaxy S7 yet, therefore I included the score numbers of the MDP/S platform to represent a best-case scenario for the Snapdragon 820 until we can get apples-to-apples scores based on Samsung's browser. This still mostly due to the fact that Chrome is seemingly not yet optimized to take advantage of Kryo's new architecture, and as a result scores some rather mediocre numbers, as seen in some preliminary LG G5 numbers included in the graphs above.

GFXBench T-Rex HD (Offscreen)

GFXBench Manhattan ES 3.0 (Offscreen)

Some quick GPU benchmarks also put the Exynos 8890 slightly behind the Snapdragon 820 in the MDP/S. We will still have to see if actual Snapdragon 820 devices are able to deliver the same performance as the MDP/S platform as there might be some thermal limitations coming into play. Again, we can't comment too much on the scores before we get to know each device's long-term performance and if the attained numbers are sustainable for long periods of time.

One observation I made today which was particularly concerning, was that both with the Snapdragon 820 LG G5 as well as the Exynos 8890 Galaxy S7 got considerably warm after running some heavy workloads. The fact that the Galaxy S7 touts having a heat-pipe thermal dissipation system is a quite worrying characteristic of the phone and should in no way be seen as a positive feature as it points to high power draw figures on the part of the SoC.

The first impression is that the performance difference between the Snapdragon 820 and the Exynos 8890 doesn't seem to be very large, therefore it will be the SoC's power draws and power efficiencies which will determine if, and which one of both will represent a superior design. Hopefully in the coming weeks and months we'll be able to get a better understanding of this new generation of SoCs so that we can paint a definitive picture of the current status of the mobile SoC space.

Comments Locked


View All Comments

  • jjj - Monday, February 22, 2016 - link

    Most are not reliable,that's the problem.
    But you seem rather confused,as it appears you think that there are only 2 choices, synthetic with no relevance and subjective opinions with no data.
    Some synthetic benchmarks are ok or better but the bulk of the benchmarks should not be synthetic , just like it has been in PC for a long long time. In mobile testing everybody is just being lazy.
  • lilmoe - Monday, February 22, 2016 - link

    Sure, they're very reliable when testing different CPUs with the SAME browser, under the SAME OS/Kernel.

    They're good to measure how much the GS7 improved compared the GS6 running the same browser running the same version of Android. They're good to show how much the iPhone 6S compared to the iPhone 6 when both are running the same version of iOS and Safari.

    OR, they're good to show how much faster a certain browser is over another running on the SAME hardware and OS.

    Outside these use cases, they're completely and utterly useless.
  • ddriver - Monday, February 22, 2016 - link

    "Outside these use cases, they're completely and utterly useless."

    Nothing that makes apple products appear unrealistically good is utterly useless on AT.
  • tuxRoller - Monday, February 22, 2016 - link

    They're be reliable IF THEY USED THE EXACT SAME BROWSER REACH TIME. As it is, it's impossible to tell if changes are due to hardware or browser optimizations.
  • ddriver - Monday, February 22, 2016 - link

    That's just a matter of professionalism and the lack of it :)
  • Meteor2 - Monday, February 22, 2016 - link

    So how should they compare platforms?
  • Ironchef3500 - Thursday, February 25, 2016 - link

    I had the exact same thought...
  • hailey14 - Sunday, February 21, 2016 - link

    Typo at the table. 4x A53@2.1GHz must be 4x A57@2.1GHz.
    Great article as always!
  • lilmoe - Sunday, February 21, 2016 - link

    Steal it! Steal it, Andrei! Ask Josh to do the same.
  • raghu78 - Sunday, February 21, 2016 - link

    Andrei's comments on LG G5 and Samsung S7 running warm is a problem typically expected from flagship Android phones trying to compete with Apple iPhone 6s. Heat pipes in a smartphone is a definite sign of thermal issues. Anyway I think the Android flagships are still struggling to get close to iPhone 6s on CPU while S820 beats it in GPU workloads.

    I expect some serious improvements in the A10 chip. Apple's cores are begging for SMT to better utilize their massive CPU cores's execution resources. TSMC InFO packaging is expected to bring lower power with smaller area. the iPhone with A10 will blow past the Android flagships and will be tough to beat at the 16/14nm FINFET node next year. We have to see if Samsung beats Apple to 10nm node. If that happens the S8 should be a big step up and the A11 built at TSMC 10nm will come 6 months later to continue the contest at 10nm node.

Log in

Don't have an account? Sign up now