Problems with PUBG: Not All GPUs Render Equally

In part of our testing with PUBG, we did stumble across a particularly alarming scenario which we never really see with standardized testing. When comparing Snapdragon to Kirin, trying to observe Huawei's quoted performance differences, there appears to be a major difference between what Adreno phones were rendering, and what Mali powered phones were rendering and displaying.

Looking into more detail, it’s very obvious that the OnePlus 6 tested here (a Snapdragon/Adreno phone) resulted in far better image quality compared to the other phones.

 

      

There are two notable characteristics. First of all, the Adreno render is simply a lot sharper. It looks like the game uses a very different image scaling algorithm. For equality testing, we set the rendering resolution to 720p and upscaled to 1080p on all of the phones. While the Adreno shows up as relatively sharp, the Mali phones are seemingly quite blurry, and this is actually also noticeable on the phone when playing.

The second noticeable element, and arguably more important, is that the Adreno phone actually has anisotropic texture filtering enabled, while the Mali devices are seemingly ignoring it and falling back to bilinear filtering. In a game like PUBG, this is also very noticeable when playing and creates quite big picture quality differences. This also puts quite a differential load on the graphics, resulting in an apples-to-oranges comparison.

Consequently, Huawei’s GPU Turbo marketing comparisons to the competition also are questionable: the anisotropic filtering performance issue can impact framerates by much as 16-18% on its own. Because the Mali GPU devices have this issue, it creates a very unequal comparison when diagnosing performance to such detail. It means that out of the gate, the performance of the Mali phones is already up 16-18%, but at the expense of quality. (Ed: We used to see this a lot in the PC space over 10 years ago, where different GPUs would render different paths or have ‘tricks’ to reduce the workload. They don’t anymore.)

It’s also to be noted that while the Mali devices actually should have a workload advantage given that they’re not doing nearly as much texture filtering work as the Adreno, the performance and efficiency of the Adreno smartphones is still better. Although admittedly the differences are minor given that the game caps out at a maximum of 40fps at maximum quality. That only leaves power efficiency as the metric.

For power efficiency, even with the difference in rendering paths and quality, here Snapdragon 845 phones have a massive advantage, playing the game at 2.5-3W with AF enabled, while the Kirin 970 phones routinely average at 4-4.5W. The higher power consumption and efficiency means that the battery life on those devices will have a deficit.

Real World vs. Synthetic Testing

While I fully understand Huawei’s focus on real-world performance comparison in PUBG rather than synthetic benchmarks, we use synthetic benchmarks to determine the varacity of new features for a good reason – they are industry standards and well understood. Honor’s and Huawei’s marketing focus on PUBG seems a bit poorly thought out when it comes to actual technical comparisons in that regard, which we address on the next page.

There is the added aspect of different GPUs not even rendering the same graphics path, as described below: the fact that Adreno GPUs add anisotropic filtering and have higher quality image scaling effectively means they’re running at a noticeably higher image quality level. This is not taken into account in the performance and efficiency comparisons in Huawei’s materials, lending the materials to be a lot less credible. 

The Bottom Line

Still, GPU Turbo is a promising new technology that will give Huawei a competitive edge, all other things being equal. The sad fact here is that for the Kirin 960 and Kirin 970, things are not equal. The competitive landscape will change a lot with the Kirin 980, but until then, current generation device users need have a clear understanding and realistic expectations to what GPU Turbo can actually bring to the table.

The Difficulty in Analyzing GPU Turbo The Minor Issue of Overzealous Marketing
POST A COMMENT

64 Comments

View All Comments

  • dave_the_nerd - Tuesday, September 4, 2018 - link

    Honor 7x? How about the Mate SE, its Huawei twin? (We have one...) Reply
  • mode_13h - Tuesday, September 4, 2018 - link

    > There is no silver bullet here – while an ideal goal would be a single optimized network to deal with every game in the market, we have to rely on default mechanisms to get the job done.

    Why not use distributed training across a sampling of players (maybe the first to download each new game or patch) and submit their performance data to a cloud-based training service? The trained models could then be redistributed and potentially further refined.
    Reply
  • tygrus - Tuesday, September 4, 2018 - link

    The benefits seem <10% and don't beat the competition (eg. Samsung S8 to S9 models).

    Why 7 pages when it could have been done in 3 or 4 pages. The article needed more effort to edit and remove the repetition & fluff before publishing. Maybe I'm having a bad day but it just seemed harder to read than your usual.
    Reply
  • LiverpoolFC5903 - Wednesday, September 5, 2018 - link

    That is the whole point of the article, to go into depth. If you dont like technical 'fluff', there are hundreds of sites out there with one pagers more to your liking. . Reply
  • zodiacfml - Wednesday, September 5, 2018 - link

    I guess, I im not wrong when I first of heard this. I was thinking "dynamic resolution" or image quality reducing feature that works on the fly. Reply
  • s.yu - Friday, September 7, 2018 - link

    Technically Huawei isn't directly responsible, you know the article said that all Mali devices run on lower settings.
    The thing you didn't anticipate is that they were citing numbers compared to Kirin 960, that threw everyone off. Seeing as they're Huawei I knew they were lying somehow, but seeing how Intel put their cross-generation comparisons in big bold print for so long I didn't realize somebody could hide such a fact in small print, or even omit that in most presentations.
    Reply
  • Manch - Wednesday, September 5, 2018 - link

    <quote> (Ed: We used to see this a lot in the PC space over 10 years ago, where different GPUs would render different paths or have ‘tricks’ to reduce the workload. They don’t anymore.) </quote>

    How does this not happen anymore? Both Nvidia & AMD create game ready drivers to optimize for diff games. AMD does tend to optimize for Mantle/Vulkan moreso than DX12(Explain SB AMD...WTF?). Regardless these optimizations are meant to extract the best performance per game. Part of that is reducing workload per frame to increase overall FPS, so I don't see how this does not happen anymore.
    Reply
  • Ian Cutress - Wednesday, September 5, 2018 - link

    Thus comment was more about the days where 'driver optimizations' meant trading off quality for performance, and vendors were literally reducing the level of detail to get better performance. Back in the day we had to rename Quake3 to Quack3 to show the very visible differences that these 'optimizations' had on gameplay. Reply
  • Manch - Wednesday, September 5, 2018 - link

    Ah OK, makes sense. I do remember those shenanigans.Thanks Reply
  • Manch - Wednesday, September 5, 2018 - link

    oops, messed up the quotes....no coffee :/ Reply

Log in

Don't have an account? Sign up now