Final Words

The Nexus 9 is undoubtedly an aspirational device. For a long time now, Google and the Android tablet market in general have been in a position similar to Amazon’s Fire tablet. This has meant that the margin on the hardware itself has been quite low, and while quality was possible to achieve there were often sacrifices made in order to reach the targeted price point. This was seen in the form of lower CPU and GPU bins in the SoC, lower quality NAND, and generally poorer displays.

The Nexus 7 (2013) did manage to mostly avoid these issues, but Google had set the bar for price and performance to the point where OEMs would have issues with maintaining acceptable profit margins on a device. The Nexus 9 changes this strategy by reaching for a higher price point and attempting to deliver a no-compromise tablet in return. To figure out whether Google has succeeded, it’s worth going over each aspect of the device before coming to any sort of judgment.

The first and quite possibly most important aspect of the Nexus 9 is the SoC. To this end, the Nexus 9 is the very first Android device with AArch64 support enabled in Android. NVIDIA’s Tegra K1 with Denver is effectively the state of the art when it comes to SoCs in the Android OEM space, and no other device has launched with this SoC. While the fact that the SoC is built around the ARMv8 ISA is important, the architecture of the CPU itself is easily one of the most interesting designs we’ve seen in years. Unfortunately, while the design of the CPU is academically interesting it doesn’t seem that this produces real-world benefits. The Nexus 9 has one of the fastest SoCs we’ve seen to date, but this comes at the cost of worse power efficiency than the Cortex A15 version of the Tegra K1.

Another piece of the puzzle is the design, which is one of the key differentiators for a high-end mobile device. While one can debate the merits of various materials, it seems to be clear that an all-metal unibody chassis would’ve greatly improved the design of the Nexus 9 and justified its positioning better. While there is some level of give in the back cover, the buttons are quite thin and hard to find, and there’s a noticeable seam where the back cover and metal frame meet, the design isn’t actually all that bad in practice. Unfortunately, this seems to be a bit of a sore point as well for the Nexus 9 when compared against the iPad lineup.

While the SoC and design are often points of distinction for a premium tablet, the display is critical for any tablet. In this regard, the Nexus 9 does surprisingly well. With a 4:3 aspect ratio, high resolution, and high quality color calibration HTC and Google have outfitted the Nexus 9 with a great display. Unfortunately, there’s a great deal of variability present in these displays that presents itself in the form of backlight bleed along the edges of the display. While my unit only has a slight amount of bleed along the top edge of the device, other units can have more or less backlight bleed depending upon variance in production.

The one aspect that seems to be the product of a poor design choice is the high reflectivity of the display. Although I’m reasonably sure that the display is laminated due to the lack of an obvious gap between the display and glass, it seems that the optical material between the display and glass is poorly designed as I can see a distracting double reflection in the display. The Nexus 9 also compares unfavorably to the iPad Air 2 in this case as the anti-reflective coating on the iPad Air 2 is far superior to just about anything I’ve seen on the market.

Although I previously noted that the power efficiency of the SoC isn’t up to scratch, overall battery life is quite good on the Nexus 9. With a combination of a large battery and efficient display, Google and HTC have managed to compensate for the power consumption issues that come with Denver’s performance. Unfortunately, it seems that Kepler’s desktop-first design results in worse power efficiency than what we see on competing solutions such as the “GXA6850” found in competing SoCs. Even if this is compensated for by the ability to enable desktop-class gaming, the Nexus 9 doesn’t appear to support full OpenGL to begin with, unlike the SHIELD Tablet. This means that the extra capabilities enabled by the GPU are effectively wasted, which hurts the value proposition for the device overall. In light of the launch of the Tegra X1, I can't help but wonder how different the experience of the Nexus 9 would be with NVIDIA's latest SoC.

Outside of these primary elements of the tablet, there seems to be a reasonable level of attention to detail. The camera is acceptable, even if the focus and capture latency aren’t the greatest. The audio quality from the speakers is also quite good, and really helps to enable a great experience when watching any kind of video or listening to music without earbuds/headphones. The software experience is acceptable, although Google continues to fight issues with ecosystem support for tablets.

With all of this in mind, it’s hard to give a resounding recommendation of the Nexus 9. The Nexus 9 is a step towards a high-end Android tablet, but not the leap that Google was hoping for. If you want an Android tablet near the size of the Nexus 9, I can’t really recommend anything else. The Galaxy Tab S falls short on account of performance and battery life, and despite the somewhat unremarkable design of the Nexus 9 I believe that it is nicer than the Galaxy Tab S. However, if one were to assume that OEMs are currently readying devices to truly carry the torch of the high-end tablet, the Nexus 9 is a hard sell. I suspect that this wouldn’t be nearly as difficult if the Nexus 9 had a lower price point of $300 and $350 USD for the 16GB and 32 GB WiFi variants, and $450-$500 for the 32GB LTE variant. Google has managed to get close to the mark with the Nexus 9, but like the Nexus 6 it seems that it’s up to the OEMs to cover the remaining distance.

WiFi Performance, GNSS, Misc
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  • MonkeyPaw - Wednesday, February 4, 2015 - link

    Maybe I missed it, but can you comment on browser performance in terms of tabs staying in memory? I had a Note 10.1 2014 for a brief time, and I found that tabs had to reload/refresh constantly, despite the 3GB of RAM. Has this gotten any better with the Nexus and Lollipop? Through research, I got the impression it was a design choice in Chrome, but I wondered if you could figure out any better. Say what you want about Windows RT, but my old Surface 2 did a good job of holding more tabs in RAM on IE.
  • blzd - Friday, February 6, 2015 - link

    Lollipop has memory management issues right now, as was mentioned in this very article. Apps are cleared from memory frequently after certain amount of up time and reboots are required.
  • mukiex - Wednesday, February 4, 2015 - link

    Hey Josh,

    Awesome review. As I'm sure others have noted, the Denver part alone was awesome to read about! =D
  • gixxer - Thursday, February 5, 2015 - link

    There have been reports of a hardware refresh to address the buttons, light bleed, and flexing of the back cover. There was no mention of this in this article. What was the build date on the model that was used for this review? Is there any truth to the hardware refresh?

    Also, Lollipop is supposed to be getting a big update to 5.1 very soon. Will this article be updated with the new Lollipop build results? Will FDE have the option to be turned off in 5.1?
  • blzd - Friday, February 6, 2015 - link

    Rumors. Unfounded rumors with zero evidence besides a Reddit post comparing an RMA device. All that proved was RMA worked as intended.

    The likelyhood of a hardware revision after 1 month on the market is basically 0%. The same goes for the N5 "revision" after 1 month which was widely reported and 100% proven to be false.
  • konondrum - Thursday, February 5, 2015 - link

    My take from this article is that the Shield Tablet is probably the best value in the tablet market at the moment. I was really shocked to see the battery life go down significantly with Lollipop in your benchmarks, because in my experience battery life has been noticeably better than it was at launch.
  • OrphanageExplosion - Thursday, February 5, 2015 - link

    I seem to post this on every major mobile review you do, but can you please get it right with regards to 3DMark Physics? It's a pure CPU test (so maybe it should be in the CPU benches) and these custom dual-core efforts, whether it's Denver or Cyclone, always seem to perform poorly.

    There is a reason for that, and it's not about core count. Futuremark has even gone into depth in explaining it. In short, there's a particular type of CPU workload test where these architectures *don't* perform well - and it's worth exploring it because it could affect gaming applications.

    http://www.futuremark.com/pressreleases/understand...

    When I couldn't understand the results I was getting from my iPad Air, I mailed Futuremark for an explanation and I got one. Maybe you could do the same rather than just write off a poor result?
  • hlovatt - Thursday, February 5, 2015 - link

    Really liked the Denver deep dive and we got a bonus in-depth tablet review. Thanks for a great article.
  • behrangsa - Thursday, February 5, 2015 - link

    Wow! Even iPad 4 is faster than K1? I remember nVidia displaying some benchmarks putting Tegra K1 far ahead of Apple's A8X.
  • behrangsa - Thursday, February 5, 2015 - link

    Anyway to edit comments? Looks like the K1 benchmark was against the predecessor to A8X, the A7.

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