LG G2 and MSM8974 Snapdragon 800 - Mini Review
by Brian Klug on September 7, 2013 1:11 AM EST- Posted in
- Smartphones
- LG
- Mobile
- LG G2
- Android 4.2
- MSM8974
- Snapdragon 800
Battery Life
One of the things Qualcomm promised would come with Snapdragon 800 (8974) (and by extension the process improvement with 28nm HPM) was lower power consumption, especially versus Snapdragon 600 (8064). There are improvements throughout the overall Snapdragon 800 platform which help as well, newer PMIC (PM8941) and that newer modem block onboard as well, but overall platform power goes down in the lower performance states for Snapdragon 800. In addition the G2 has a few unique power saving features of its own, including display GRAM (Graphics RAM) which enables the equivalent of panel self refresh for the display. When the display is static, the G2 can run parts of the display subsystem and AP off and save power, which they purport increases the mixed use battery life case by 10 percent overall, and 26 percent compared to the actively refreshing display equivalent. In addition the G2 has a fairly sizable 3000 mAh 3.8V (11.4 watt-hour) battery which is stacked to get the most out of the rounded shape of the device, and utilizes LG's new SiO+ anode for increased energy density compared to the conventional graphite anode.
Our battery life test is unchanged, we calibrate the display to exactly 200 nits and run it through a controlled workload consisting of a dozen or so popular pages and articles with pauses in between until the device dies. This is repeated on cellular and WiFi, in this case since we have an international model of the G2 that lacks the LTE bands used in the USA, that's 3G WCDMA on AT&T's Band 2 network. I've tested 3G battery life on devices concurrently for a while now in addition to LTE though, so we still have some meaningful comparisons. The most interesting comparisons are to the Optimus G (APQ8064) and HTC One (APQ8064T) previous generation.
The LG G2 battery life is shockingly good through our tests, and in subjective use. The combination of larger battery, GRAM for panel self refresh, new HK-MG process, and changes to the architecture dramatically improve things for the G2 over the Optimus G. While running the two web browsing tests I suspected that the G2 might be my first phone call test to break 24 hours, while it doesn't break it it comes tantalizingly close at 23.5 hours. I'm very impressed with the G2 battery life.
The G2 also charges very fast for its battery size. I've been profiling charging behavior and current for devices for a while now, since I strongly believe that battery life and charging speed are complementary problems. You should always opportunistically charge your smartphone, being able to draw as much while you have access to a power outlet is critical. The G2 can negotiate a 2A charge rate on my downstream charge port controller and charges very fast in that mode. Of course the PM8941 PMIC also includes some new features that Qualcomm has given QuickCharge 2.0 branding.
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Impulses - Saturday, September 7, 2013 - link
I've got an EVO LTE but I'm on a similar boat, furthermore, this is the first tine in three years where I'm just not in a hurry to upgrade. Going to dual cores and 1GB of RAM was huge (EVO to EVO 3D), going from qHD to 720p and a much thinner device last year was also huge (not to mention ICS/JB)... Right now there's no hugely compelling hardware/software reason urging me to upgrade tho. I still might if this comes out as a Nexus 5 for $350 tho...RollingCamel - Saturday, September 7, 2013 - link
What about the audio codecs LG claimed support for? Did you try FLAC on it?maglito - Monday, September 9, 2013 - link
FLAC has native support on every 4.X android device.shackanaw - Monday, September 9, 2013 - link
He's referring to the 24-bit/192khz support and other improvements mentioned in the G2 hands on: http://www.anandtech.com/show/7205/hands-on-with-t..."LG has made audio in the line-out sense a priority for the G2. We’ve seen a lot of emphasis from other OEMs on speaker quality and stereo sound, with the G2 LG has put time into rewriting part of the ALSA stack and Android framework to support higher sampling and bit depth. The inability of the Android platform to support different sampling rates for different applications remains a big limitation for OEMs, one LG wrote around, and with the G2 up to 24 bit 192 kHz FLAC/WAV playback is supported in the stock player, and LG says it will make an API available for other apps to take advantage of this higher definition audio support to foster a better 24-bit ecosystem on Android.
"I asked about what codec the G2 uses, and it turns out this is the latest Qualcomm WCD part, which I believe is WCD9320 for the MSM8974 platform. LG says that although the previous WCD9310 device had limitations, the WCD9320 platform offers considerably better audio performance and quality that enables them to expose these higher quality modes and get good output. The entire audio chain (software, hardware codec, and headphone amplifier) have been optimized for good quality and support for these higher bit depths, I’m told. I didn’t get a chance to listen to line out audio, but hopefully in testing this emphasis will play itself out."
tuxRoller - Tuesday, September 10, 2013 - link
24bit playback is a gimmick since even the studio equipment, apparently, doesn't handle the full 24bit. Aside from that, you just don't need that much sample accuracy unless you're superman.http://xiph.org/~xiphmont/demo/neil-young.html
ssj3gohan - Saturday, September 7, 2013 - link
Why are the iPhone raw triangle/fill rate tests so much better than any other phone, yet does it perform middle of the pack in gfxbench and such? I was under the impression that they basically had the best graphics solution around, paired with awesomely optimized software.et20 - Saturday, September 7, 2013 - link
Apparently they didn't optimize for gfxbench.UpSpin - Saturday, September 7, 2013 - link
The meaningless synthetic benchmarks always favored iOS. The reason many people think that iPhones are magnitudes more powerful than Android devices.The only meaningful benchmarks are normal 3D scenes.
I don't understand why Anandtech still posts those meaningless benchmarks. Or can you read something out of them? NO! They are in no way a measurement for performance. They are basically useless. That's the reason we don't see them on desktop GPU comparisons.
tuxRoller - Saturday, September 7, 2013 - link
They give you a good idea of the device's capabilities in specific areas. Useful for doing a deep dive to determine what the make-up of the device is.For realworld use, you are absolutely right, and, imho, such synthetics only belong in articles where there are new components (like this one), but for the next snapdragon-800, I don't think those particular benchmarks need be run..
Krysto - Sunday, September 8, 2013 - link
Sunspider also seems pretty pointless at this point. Kraken and Octane seem to give more accurate results in terms of chip performance.