The NVIDIA SHIELD Tablet Review
by Joshua Ho on July 29, 2014 9:00 AM ESTBattery Life
As always, battery life is one of the most important aspects of any mobile device, and is crucial to staying mobile. There’s not much introduction needed to this, as it’s rather well understood that more battery life is usually better. The Shield tablet features an integrated 19.75Wh battery.
This device is a tablet first and foremost, so WiFi browsing battery life is important. In this area, the tablet does well. However, it’s a bit strange how the device performs worse than the Nexus 7 (2013). The reason why I say this is that the Tegra K1 is on a far more power efficient process (28HPm), has broadly equivalent battery capacity to screen area scaling, and should have a more power efficient display due to the reduced gamut. However, it could be that Cortex A15 just isn’t as power efficient as Krait and the silicon backplane of the display isn’t as efficient as the one in the Nexus 7.
While normally web browsing tests are enough to cover the relatively low-compute use cases for smartphones, video playback is a significant use case for tablets. Here, we see that the gap between the Nexus 7 (2013) and the SHIELD Tablet narrows significantly, which can probably be attributed to the mostly display-bound nature of this test. Due to the much lower APL average of this test, we see that the Galaxy Tab S line does noticeably better in this test because their AMOLED displays mean that black-heavy content dramatically reduces power draw. This is because a black pixel in an AMOLED display is turned off and doesn't consume power, while an LCD display relies on a backlight so it isn't possible to turn off the backlight for a single pixel without turning off the entire display.
Of course, the Shield Tablet is also designed for gaming. Unfortunately, the Tegra K1 introduces quite a massive amount of dynamic range. While it’s fully possible for the Shield tablet to last 10 hours of continuous use on a single charge, running the GPU at full blast gives battery life similar to a gaming laptop. Realistically, if a game is made for Tegra K1 and truly stretches the GPU to the limit, battery life is only around two and a half hours, assuming display brightness is kept down to 200 nits. Of course, anything less intensive will do much better.
NVIDIA has also made it possible to cap the maximum frame rate and clock speed for better battery life. However, it’s quite clear in this test that the tablet isn’t capable of sustaining peak performance the way the Shield portable was, as the Shield portable sustained around 90% of the first run performance while the tablet sustained around 80% of its first run performance. The Shield Tablet also has noticeably higher skin temperatures, although this was a subjective observation.
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Knowname - Wednesday, July 30, 2014 - link
you make a good point, and one I actually considered when I looked for a new toy half a month ago. The Nexus7 (2013) would be just fine for my needs. THAN I saw this out of the corner of my eye and yes, I'll admit I WAS wooed somewhat by the false fantasy that is the 'latest and greatest'. The Nexus 7 is just fine and half the price! In the end though I succumbed to consumerism and though I like to think I'm very frugal I think I made a good deal.Bottom line, it's more than just a little snappier, it's THREE TIMES as snappy! The speakers are an upgrade, the connectivity is an upgrade, SD card compatible and best of all a great selfie camera!! xD ok I kid. Anyway forget the gamestreaming stuff (though... a definite plus if you leave your computer on 24x7) it's still very future proof I won't need to upgrade my tablet for at least a couple years with this!
Unfortunately I bought a GT630 along with this hoping it'd do the trick for gamestreaming but... I don't think it will by what I hear... why just the energy hog GTX cards?? Like I'm gonna leave a GTX based computer on 24x7 just so I can use it more on a remote basis? *ahem* not likely... hopefully they come out with some extremely low power GTX cards in the future.
fivefeet8 - Thursday, July 31, 2014 - link
Gamestream works with the recent Maxwell GTX 750 Ti. Probably one of the best if not the best performance per watt card out now. Plus most video cards use much lower power during idle.Knowname - Thursday, July 31, 2014 - link
but when your playing it it won't be idle. The GTX750ti may be my best bet, once I can get one for like 80 bucks I'll jump on it!phoenix_rizzen - Tuesday, July 29, 2014 - link
Small correction: First line of second paragraph:"NVIDIA is becoming the first tablet to launch a serious gaming tablet"
Guessing that "first tablet to launch" should be "first OEM to launch" or maybe "first hardware manufacturer to launch".
phoenix_rizzen - Tuesday, July 29, 2014 - link
Page 2, Console Mode paragraph:"Finally, there’s the aspect of GameStream and GRID, which make it possible for games to be played on the tablet that would otherwise wouldn’t work due to the compute requirements."
There's one to many "would" in that line. Guessing it's supposed to be "that wouldn't otherwise work".
Death666Angel - Tuesday, July 29, 2014 - link
Second paragraph:"today NVIDIA is becoming the first tablet to launch a serious gaming tablet running Android. "
Probably supposed to mean "first manufacturer" or something along those lines. :D
JoshHo - Tuesday, July 29, 2014 - link
Well, that's embarrassing. Typo corrected.SleepyItes - Tuesday, July 29, 2014 - link
Tegra K1 should support OpenGL ES 3.0, right? So, I wonder if it would be able to run the Dolphin (GameCube and Wii) emulator? The regular shield is awesome for running everything from NES to PSP (and even some NDS games), but being able to play GC/Wii games would be amazing. At the very least it would be cool if it could run NDS (e.g. DraStic) a little faster.lmcd - Tuesday, July 29, 2014 - link
ES 3 is a subset of OpenGL 4. There's no "wondering" about it.As long as the CPU translation is efficient on ARM, it should be feasible.
Read before you post.
fivefeet8 - Tuesday, July 29, 2014 - link
It supports OpenGL ES 3.1 and above. Portal and HL2 are running in Full OpenGL 4x mode on it. I doubt Dolphin couldn't run the same as it already did with the TK1 Dev board.