GPU Performance

Along with the 10% increase in peak CPU clock speeds, the version of Snapdragon 821 in the OnePlus 3T also increases the peak GPU frequency to 653MHz, up from 624MHz in the OnePlus 3. This is a relatively modest improvement, so the corresponding increase in performance will also be rather modest as well. In the interest of merely verifying that performance has improved as expected, I've run 3DMark Sling Shot and GFXBench Car Chase on the OnePlus 3T.

3DMark Sling Shot 3.1 Extreme Unlimited - Graphics

3DMark Sling Shot 3.1 Extreme Unlimited - Physics

3DMark Sling Shot 3.1 Extreme Unlimited - Overall

The 3DMark graphics test actually doesn't see much of an improvement on the OnePlus 3T. It may be that I simply got an exceptionally good score on the OnePlus 3, but it is interesting to see such a large gap in the physics test, which should favor the OnePlus 3T with its higher-clocked CPU cores.

GFXBench Car Chase ES 3.1 / Metal (On Screen)

GFXBench Car Chase ES 3.1 / Metal (Off Screen 1080p)

In GFXBench Car Chase the OnePlus 3T shows a performance uplift of around 10% compared to the OnePlus 3. This is slightly higher than expected, but due to the truncation of results in the latest GFXBench this may be slightly exaggerated, which tends to happen when comparing devices that differ in performance by only one or two frames per second.

NAND Performance

In our recent review of the Pixel XL one of the problems we ran into was that AndroBench had been broken by the adoption of file-based encryption (FBE) in Android Nougat. AndroBench is the benchmark we use to measure storage performance, and since that time it has been updated with a new version that works on devices that use FBE. However, the results are not comparable to results from AndroBench 4, so going forward we will be using the AndroBench 5 test with a new data set for device results.

As always, our storage test examines the performance for random reads and writes using a 4KB transfer size, and sequential reads and writes using a 256KB transfer size. These settings are chosen to match what actually occurs when an application performs IO operations. Only one IO thread is used, which again mirrors how applications are actually designed in order to reflect the performance that will be seen in real usage instead of reflecting potentially higher speeds that the hardware may be capable of, but that will almost never be encountered in an actual use case.

AndroBench 5.0 - Random Read

AndroBench 5.0 - Random Write

AndroBench 5.0 - Sequential Read

AndroBench 5.0 - Sequential Write

In Androbench 5 the OnePlus 3T tops the charts. However, it's important to recognize why this is, particularly where write speeds are concerned. Most smartphones we review have either 16GB or 32GB of internal memory. The OnePlus 3 has 64GB, and this OnePlus 3T unit is the flagship 128GB model. With flash memory, assuming that you have some density for a chip, increasing capacity is accomplished by increasing the number of chips. Because SSDs and other flash memory devices utilize parallel writes to improve performance, increasing the number of dies can allow for greater performance by increasing the number of writes that can happen in parallel.

In addition to the larger amount of internal storage, OnePlus has also adopted F2FS for the filesystem, which is another source of performance improvements, particularly in the case of random write speeds.

With that in mind, the results from AndroBench actually aren't that shocking. In the write tests the 128GB model of the OnePlus 3T is well ahead of every other device, including the 64GB OnePlus 3. Read performance is also improved compared to the OnePlus 3, but not to the same extent.

System Performance Battery Life and Charge Time


View All Comments

  • mortimerr - Monday, November 28, 2016 - link

    Very few people, especially here, would voluntarily want to use whatever custom OS ZTE uses on the Axon 7, and even though ZTE is finally giving the appropriate data needed to get sound working with CM, it's still very early nightlies with numerous bugs you'd have to contend with.

    Where it's a completely different world with OP. And that's even if you decide not to use OxygenOS.
  • ToTTenTranz - Monday, November 28, 2016 - link

    And the Axon 7 has a 1440p 5.5" AMOLED screen. And a dedicated DAC for reproducing 24/32bit audio sources, and amplified dual front-facing speakers.
    And it's allegedly one of the first few devices to support Daydream along with the Pixel phones.

    If only ZTE would send review copies to anandtech...
  • bananaforscale - Tuesday, November 29, 2016 - link

    Having a dedicated DAC for 24/32 bit sources is waste. You won't hear the difference and anyway you can simply add zeros to get the maximum word length. Reply
  • rocketman122 - Tuesday, November 29, 2016 - link

    Yep. Id take the zte way before taking this opo 3 terrible. Oneplus support is crap just as much. So pay less and get more Reply
  • bananaforscale - Tuesday, November 29, 2016 - link

    Don't count Beats phones as a value-add unless you have no idea what music should sound like. Reply
  • kubina - Friday, December 2, 2016 - link

    No it's not :)
    The Oneplus 3T is not only best vaue-for-money phone, it's actual best phone on market. 3T is fater than iPhone 7Plus or Pixel XL. Have bigger battery and excellent almost pure OS.
    Only feature where is Pixel (I'm not, if iPhone also) slightly better is Camera. But for this incremental uplift, I'm not willing to give twice more money.
    Especially, Oneplus have better design, is thinner, have much better body-to screen-ratio and is lighter.
    ZTE is typical phone , who looks good on paper, but the User experience is not so good :) Not is about paper specifications :)
  • negusp - Monday, December 5, 2016 - link

    Eh, no. The Axon 7 is cheaper and has all-round better specs, and has official CyanogenMod support. Reply
  • Kepe - Monday, November 28, 2016 - link

    3D Mark Slingshot physics and overall test results between the OnePlus 3 and the OnePlus 3T seem to be flipped. Reply
  • zeeBomb - Monday, November 28, 2016 - link

    Aint that unexpected...OnePlus going for UFS 2.1 and F2Fs out of the box does make a huge difference in real world usage. Does that mean we'll not see much development with the original OP3?

    Here's a video where the iPhone 7 lost to the OP3 in some basic tests:
  • zeeBomb - Monday, November 28, 2016 - link

    I wish this had the updated Sony IMX398 sensor. That would have been amazing. Maybe for the c4 I guess. Reply

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