Samsung Exynos 7420 power consumption measured: big improvements
posted by Victor H. / Jul 02, 2015, 9:41 AM
Unlike Intel, chip makers in the mobile space are reluctant to give out details about their chips, leaving the task to developers to explore with microbenchmarks and reviewers to dig out fine details and reverse-engineer their efforts. Samsung's Galaxy S6 is no stranger to that practice as there are little public details available about the inner workings of its Exynos 7420 system chip.
iPhone 6s family), and it seems to be a remarkably powerful chip.It's a very interesting chip for a few reasons: it's the first 14nm system chip by Samsung, it has arrived before the competing FinFET 16nm process is made available by TSMC (rumors claims that this technological advantage might have won Apple to switch over to Samsung's fabs for the
Luckily, AnandTech's Andrei Frumusanu has published a deep dive on the Exynos 7420 system chip with separate looks at the major building blocks of this SoC: the big.LITTLE CPU that uses four high-performance Cortex A57 cores in combination with four low-power Cortex A53s, the new Mali T760 GPU, and the use of LPDDR4.
It's a fascinating read and we'd like to share a few of the most interesting conclusions AnandTech makes about the Exynos 7420. The first thing that most people would be interested in is - naturally - power consumption and how it is affected by the new 14nm process. What's measured in the charts below is average consumption per core first for the A53 cluster, and then for the A57 quad-core cluster, each followed by a comparison to power consumption by the respective big and LITTLE clusters in the Exynos 5433 (the chip that powers the Samsung Galaxy Note 4).
All of those improvements are worth applause: maximum power consumption of the A57 cores in the Exynos 7420 stands at 5.49W, much less than the 7.39W peak in the 5433. Interestingly, the disparity gets even higher when you look at different clock speeds: for instance, at 1.9GHz, the 7420 uses only 4.12W in comparison to the 7.39W of the 5433.
For more details and a real deep dive on the Exynos 7420, hit the source link right below.
Posts: 1518; Member since: Feb 14, 2015
thats why the GS6 gives atleast 3.5hrs of SoT. Moar could be achieved
posted on Jul 02, 2015, 9:49 AM 3
I get 6-6.5 hours SoT with S6. With lighter use, I can get 8 hours. just some tweaks here and there to help with the usual lollipop drain.
posted on Jul 02, 2015, 9:51 AM 8
Posts: 146; Member since: Nov 06, 2011
What is the point of smartphone if data is turned off?! I need to get emails and i do not have a time to worry if i'm within WiFi range or not. I keep WiFi off at all time because i need mobile data. I keep GPS off at all time too and yet to get more than 3 hours SOT. SGS6 standby time is what it kills it for me. I do not have any background process besides exchange email. Checked the exchange account and that is not what is killing the battery ... Google Play Services kills the standby time on mine. I do not care for SOT
posted on Jul 02, 2015, 12:14 PM 8
No I shouldn't, I've spoken to enough S6 owners in the real world and online to know 3-4 hours SoT is normal. What you're telling people is NOT normal, you must know that because there is no why your stupid enough to ignore all the feedback from users and reviews over the last 2 months.
posted on Jul 02, 2015, 12:31 PM 0
Posts: 142; Member since: Apr 06, 2013
3.5 hours is realistic and what normal users get. Everybody that gets 6+ hours must have a full time job of being Android power human management system; the brightness on the lowest, turning Wi-Fi, Cellular Data, Bluetooth, GPS on and off all the time. Who wants to do that? Only a few people, so they can say they 6 hours, but it's not a real time. The real time is when you use the phone normally, enjoy it and whatever you get at the end is what the time is.
posted on Jul 02, 2015, 6:31 PM 2
Posts: 792; Member since: Sep 17, 2013
on kitkat I used xposed to automatically switch to 2G network on lock and keep data active for 10 minuts after lock. I also had the CPU underclocked automatically when screen was locked for some time. there are many tweaks... possibilities are endless.
posted on Jul 02, 2015, 3:39 PM 2
Posts: 1656; Member since: Jun 06, 2010
There is not much die shrink in TSMC's 16nm compared to 20nm. http://www.extremetech.com/wp-content/uploads/2014/12/Cell-SizeComparison.png
posted on Jul 02, 2015, 10:32 AM 3
As consumers, why should we care about die shrinks. I only care about the performance and power efficiency improvements.
posted on Jul 02, 2015, 10:36 AM 4
Posts: 28; Member since: Jun 22, 2015
Which raises the question: Why isn't the Exynos 7420 being used in the upcoming S6 Edge "Plus," according to all the published leaks? Instead, they're apparently going with the lesser Snapdragon 808, which I don't get, if it's true.
posted on Jul 02, 2015, 11:30 AM 0
Posts: 96; Member since: Nov 24, 2014
Because its not meant to be Flagship level or compete with the Note 5...
posted on Jul 02, 2015, 11:43 AM 1
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