Database Users

Is the Nexus 4 really overheating?

I know many people have been saying the low benchmark scores on the Nexus 4 are due to "thermal throttling" but I don't really believe this. It's supposedly based on the optimus g, and if that doesn't suffer from this thermal throttling issue, then why would the Nexus 4? I personally believe it's just due to the software. People are also saying that an update won't boost the performance by that much, but I'm not sure what to believe.
So do you guys really believe that the nexus 4 is over-heating and under-clocking itself, or do you believe it is just in need of an update?

It may be a faulty unit from that reviewer, I only recall one review saying it overheated. The software is also to blame. I made a post in another thread about the performance with these pre-release software versions the reviewers have.
http://forum.xda-developers.com/showthread.php?p=33634026#post33634026

Unfinalized software on all these review devices is probably the bottleneck. Not to mention benchmarks have zero bearing on anything ever.

And Testing units and software do have a tendency to carry heavy logcats and monitoring software... I remember from the ICS days how "heavy" most leaks would run progressively getting better by the update ...

Nospin said:
Unfinalized software on all these review devices is probably the bottleneck. Not to mention benchmarks have zero bearing on anything ever.
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Whilst benchmarks shouldn't matter too much, when this beastly specced phone is getting worse scores than the msm8960 with adreno 225, then it will obviously raise some concerns.

E3SEL said:
I know many people have been saying the low benchmark scores on the Nexus 4 are due to "thermal throttling" but I don't really believe this. It's supposedly based on the optimus g, and if that doesn't suffer from this thermal throttling issue, then why would the Nexus 4? I personally believe it's just due to the software. People are also saying that an update won't boost the performance by that much, but I know if I wrote the drivers for the phone, it wouldn't even start.
Do you guys really believe that the nexus 4 is over-heating and under-clocking itself, or do you believe it is just in need of an update? Also, another thing I wonder is this: is it called the nexus 4 because it has a 4" (4.7", I know) display, or is it called a nexus 4, because it is the fourth nexus?
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I wouldn't say I'm good or experienced enough with Android smartphones to decide whether or not it's due to software, but I sure hope it is. I'm really only judging this particular issue by what everyone else is saying.
In regards to the sceen size and "Nexus 4" theory, I agree. Nexus 7 and Nexus 10 are a good example of device names in correlation with screen sizes here.

just wondering why did google name their nexus phone 10 wbefore the fourth one

I think it all came from a comment at Anandtech, they attempted to run all the GLBenchmark tests one after another, most web sites just chose 1 or 2 tests, usually Egypt HD. Most devices crash when trying to run all GLBenchmark test serially, it does on my Nexus 7, something to to do with running out of memory allocation.
Nexus 4 in a kind of suicidally awesome way completes the entire GLBenchmark suite in one go, but running all those test including offscreen & onscreen is a long brutal test, maxing out the SoC in a way no game is likely to do, so the fact that the device is thermal regulating itself is not that strange.
If Anandtech tested individual elements of GLBenchmark, as most other review sites do, this issue would not have occurred. In fact they admitted that the Optimus G could not run all tests consecutively, so they only tested individual elements, hence no the device didn't get downclcoked due to thermal limits. It is not good that Anandtech has this disparity in testing methodology, I like the website a lot, but some thing recently have led me to question a few things, but that is another story.

Every phone overheats nowadays so there's nothing different with the n4.

This is pretty interesting
Benchmark comparison. Once at room temp, once in freezer. Freezer scores are significantly better
http://techie-buzz.com/mobile-news/...es-show-the-real-power-of-the-s4-pro-soc.html
So yeah... Kinda does look like pretty bad thermal issues Hopefully just cause it was pre-release or something

Turbotab said:
If Anandtech tested individual elements of GLBenchmark, as most other review sites do, this issue would not have occurred. In fact they admitted that the Optimus G could not run all tests consecutively, so they only tested individual elements, hence no the device didn't get downclcoked due to thermal limits. It is not good that Anandtech has this disparity in testing methodology, I like the website a lot, but some thing recently have led me to question a few things, but that is another story.
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But they singled out the Optimus G, because it was unable to complete more complex tests because of crashes.

mejobloggs said:
This is pretty interesting
Benchmark comparison. Once at room temp, once in freezer. Freezer scores are significantly better
http://techie-buzz.com/mobile-news/...es-show-the-real-power-of-the-s4-pro-soc.html
So yeah... Kinda does look like pretty bad thermal issues Hopefully just cause it was pre-release or something
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Wow, that is a very interesting find. I was actually thinking that someone should do a freezer test just see if it is overheating. This article would seem to prove that it is. Those retests show dramatically higher scores, more on par with what the S4 processor should be capable of.
They said that perhaps the retail versions will have a higher tolerance for heat because they did not think they felt that hot. More testing and info is needed though.

Ryukeima said:
They said that perhaps the retail versions will have a higher tolerance for heat because they did not think they felt that hot. More testing and info is needed though.
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To elaborate, straight from the source, in the Anandtech podcast this morning Brian commented that the phone seemed to be set to throttle at 60 degrees (for the dual-krait S4 at least it's usually around 80 afaik) and at that point the exterior of the phone was much cooler than a lot of other phones. (He talks about it at about 00:51:00.)
Something to think about.

Sjael said:
To elaborate, straight from the source, in the Anandtech podcast this morning Brian commented that the phone seemed to be set to throttle at 60 degrees (for the dual-krait S4 at least it's usually around 80 afaik) and at that point the exterior of the phone was much cooler than a lot of other phones. (He talks about it at about 00:51:00.)
Something to think about.
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That means it's a simple tweak, and so as long as people aren't noticing excessive heat (which we would have heard from reviews) on the phone itself then is sounds like things will be fine for the release.

Yes IT FREAKING OVERHEATS
E3SEL said:
I know many people have been saying the low benchmark scores on the Nexus 4 are due to "thermal throttling" but I don't really believe this. It's supposedly based on the optimus g, and if that doesn't suffer from this thermal throttling issue, then why would the Nexus 4? I personally believe it's just due to the software. People are also saying that an update won't boost the performance by that much, but I know if I wrote the drivers for the phone, it wouldn't even start.
Do you guys really believe that the nexus 4 is over-heating and under-clocking itself, or do you believe it is just in need of an update? Also, another thing I wonder is this: is it called the nexus 4 because it has a 4" (4.7", I know) display, or is it called a nexus 4, because it is the fourth nexus?
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Click to collapse
I've had the phone for five days now and it definitely overheats. The last time it overheated was this morning. I got up, looked at the phone and unplugged it from the charger. Went to attend to my toddler for 20 mins and came back and saw that the phone was very warm and battery life was hit 20 percent. I did a check on battery usage under 'battery' in settings and saw that the playstore app had sucked 50% of the power of late. This is HIGHLY unusual becuase usually the screen is what sucks the most juice. I turned it off and turned it back on and it went back to being normal. During this overheating the phone stutters EXTREMELY visibly. Probably due to the massive thermal throttling of the cores. Once it cools off it goes back to being normal. This happens randomly and occurs once or twice a day. I've reported the bug to google. Otherwise the phone is superb.

That sounds like the Play Store app is misbehaving. Have you tried clearing the data?
Sent from my Nexus 4 using Tapatalk 2

Remember it's winter at northern hemisphere. So overheating might not be obvious.
Any friends in southern hemisphere (Australia) wanna chime in with their temperatures?

Paradisle said:
I've had the phone for five days now and it definitely overheats. The last time it overheated was this morning. I got up, looked at the phone and unplugged it from the charger. Went to attend to my toddler for 20 mins and came back and saw that the phone was very warm and battery life was hit 20 percent. I did a check on battery usage under 'battery' in settings and saw that the playstore app had sucked 50% of the power of late. This is HIGHLY unusual becuase usually the screen is what sucks the most juice. I turned it off and turned it back on and it went back to being normal. During this overheating the phone stutters EXTREMELY visibly. Probably due to the massive thermal throttling of the cores. Once it cools off it goes back to being normal. This happens randomly and occurs once or twice a day. I've reported the bug to google. Otherwise the phone is superb.
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Same thing happened to me earlier today, I unplugged the phone from the charger and was extremely hot. I panic and shut the phone off. I rooted the phone last night so that was the only thing I did differently. I've had the phone for almost a week.
I also noticed the battery was draining way too quickly.

More like rogue apps... had the phone for over a month now, heavy usage every day and never once has it "overheated"as people say.
If im multitasking, like listening to music, downloading a torrent in the backgroud while playing angry birds or something the top back of the phone will get warm, but nothing unbearable if i deliberatly grab and hold the phone at that spot.
It's a glass phone... it will get warmer than most people are used to... its bascially the same glass that the new kitchen ovens use as a top surface... if you can cook on a glasstop stove... a phone heating up will be the same principle, albit on a smaller scale..
So yes, for the people complaining about heat.. then say in the next breath that they lost battery in some % form... funny how nobody is telling what they have installed as extra..or post screenshots of the battery page to back up the claim with info so we can help...large loss of battery % right away points to a rogue app somewhere.. you dont magically lose 10-20-50% whatever battery when unplugging the phone... thats something stuck running that is forcing your cpu to run at max for an extended period of time.
so as the internet expression says "fraps or it didnt happen" (screenshot or it didnt happen) lol

I am seeing battery temp reach 40C during antutu benchmark test running 4.2.2. Looks like it is only affecting a few devices. It gets warm during the benchmark test but nothing like unbearable heat.

❄ The LG G4 TEMPERATURE THREAD ❄

We all know why LG choose 808 over 810, now let's see the results of their choice:
Here we'll talk about the G4 operating temperature.
Try to indicate your ambient temperature, model, display brightness, app(s) used, your cpu utilization (I use cool Tool for it), and of course temperature (for that purpose I use Cpu Temp wich basically reads bms sensor of Cpu-z in overlay, and Cpu-z itself) ;
Remember to distinguish battery temperature from cpu sensors temperature and if using cpuz remember that temperatures are very sensitive to time so measure it only while performing the task wanted.
Keep it as scientific as possible
*I forgot to mention that CpuZ has an erroneous C to F conversion. So keep it in °C to be accurate
There is an intersting heat comparison HERE on Android Central to begin with

Good idea. Do note that CPU-Z seems to have a bug where it converts temperatures incorrectly from C into F, in the Thermal tab. From what I've seen, CPU-Z should be set to display in C, not F, if you want accurate readings.
To see the issue, check the temps, including in the Battery tab, then in the Thermal tab. For me, in C, the Thermal tab numbers seem reasonable, and the "battery" line in Thermal is close to the temp shown in the Battery tab. But change the units to F, and the Thermal tab suddenly reads the battery, and everything else, too-high by about 30F. The temperatures are not converting properly from C to F, the displayed C and F values are not equivalent. This conversion issue appears using CPU-Z on my last phone, as well.
So if posting CPU-Z temps from the Thermal tab, I'd suggest setting it to C, not F.

Thanks, I forgot to mention it, added

What's the point of this thread? This isn't a PC, it's not like we can do anything about the temps.

kyle1867 said:
What's the point of this thread? This isn't a PC, it's not like we can do anything about the temps.
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That is where you are wrong. It's called we can hard mod the phone for better temps.

Total newbie question, is the temperature you're feeling on the hand the one from the CPU, or the one from the battery, which is closer to the hand?

DeadPotato said:
Total newbie question, is the temperature you're feeling on the hand the one from the CPU, or the one from the battery, which is closer to the hand?
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Click to collapse
It should be the battery because I notice my phone getting warm pretty often and I have a widget for battery temperature which tends to go up to around 38 °C often. I didn't check CPU temperatures but I don't think the CPU is heating up too much.

82 F - sitting on the desk doing nothing but looking pretty. VZW, brightness at 0% and Auto.

All these freaking temperature problems will be resolved in a few months when the freezing winter arrive xdddddddddddddf
Sent from my LG G4 H815 USA 4G LTE TMO

MrSteelX said:
That is where you are wrong. It's called we can hard mod the phone for better temps.
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Lol, no, you can't.

At least LG choosing 808 instead of 810 due to hear issue was the right choice.
https://youtu.be/HltGLYZLySs
Take a look at a link above, SD810 might have upper hands during cooled state but that changes quickly throttling down below SD808 specs. SD810 potentials are pretty much obsolete and probably will never run on full more than 5 minutes.
SD808 is holding its speed even running hot. So I wouldn't really worry about hear part for this phone. But I'm with some users here. Few software updates will iron out some heating problems.
Sent from my LG-H811 using XDA Free mobile app

I've noticed that phone is getting hot when charging even if the phone is in standby. I'm getting around 40-44c.

t68kv said:
I've noticed that phone is getting hot when charging even if the phone is in standby. I'm getting around 40-44c.
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That's low for charging honestly if your referring to cpu temp. Most phone cpu temps stay around 25-35 idling and mid 40s when just doing simple scrolling and small tasks. 60-70c is fairly normal on heavier tasks and games. Kernels usually don't even start throttling until the cpu gets in the70-80c (generally most start shutting down cores at 80).
That being said, my G4 is one of the coolest running phones that I've messed around with. CPU-Z usually says that I'm in the low 40s even on some heavier tasks. I know that my Note 4 gets much warmer, much faster. Heavy web browsing for example will have my N4 in the upper 50s low 60s. The G4 stays pretty stable in the upper 40s low 50s. I'm happy they chose the processor that they did honestly. Stays pretty cool compared to the competition.

you can even mine cryptocurrency on this beast for hours on a normal (here normal) 27-30°C ambient temperature, and the battery gets to 44°C and the CPU gets into the 50s.
This phone has one of the BEST thermal management I've ever seen. I was a nexus 4 user, so you can see how much i was struggling.
Sent from my LG-H815 using Tapatalk

Thank you all
Please add which sensor are you referring to and with wich app you use to read sensors

sharpehenry said:
At least LG choosing 808 instead of 810 due to hear issue was the right choice.
https://youtu.be/HltGLYZLySs
Take a look at a link above, SD810 might have upper hands during cooled state but that changes quickly throttling down below SD808 specs. SD810 potentials are pretty much obsolete and probably will never run on full more than 5 minutes.
SD808 is holding its speed even running hot. So I wouldn't really worry about hear part for this phone. But I'm with some users here. Few software updates will iron out some heating problems.
Sent from my LG-H811 using XDA Free mobile app
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I don't pretend to be rude, but that information is outdated and inaccurate. I don't know how the other manufacturers are doing with the 810 to be honest, the Z3+ is sort of new and I've been checking the threads but there's too early to judge so far, it happens that I do have an HTC One M9 up to date, stock and unrooted and I've noticed several improvements through updates. Considering my daily usage I didn't feel this was matching with what I experience in real life, so I decided to redo the test on the video. I ran AnTuTu benchmark 64 bits version 4 times in a row, and left an average of a minute (sometimes less, once was a bit more cause I took the wrong screenshot) between tests. The attachments were uploaded in chronological order, you can also guide for the hour displayed from the device.
Now besides the video only runs 4 times, I did notice it was holding every couple of tests and then decreases, so I decided to run one more for the sake of pure testing and check throttling behavior, and surprisingly the fifth run gave me an increase on the score instead of lowering it further.
I didn't find a dedicated benchmark thread on the G4 forum, unless LG had improved a lot the 808, and based on the several benchmark results you'll find across the internet, including the ones in that video, looks like even throttling snapdragon 810 holds as an 808 in worst case scenario.
About heating problems, if I'm providing a success case scenario with a more troublesome chip like the 810 is, I'm completely sure the 808 will be fixed in time

phone gets crazy hot when running Periscope
it even shows that hot temp message / stops charging
try broadcasting for 5 mins

Intersting comparison between M9, S6, G4, Droid Turbo heat dissipation HERE

Periscope heats up the phone like crazy!

I too have had issues with the device getting very hot on the top half of the screen. Tried a couple of factory resets but it didn't help. Even reset one more time and kept it stock after a few hours same problem. Took it to the AT&T store and of course it was behaving fine. Luckily the rep knew me and accepted I knew what I was talking about. Swapping mine for one first thing this morning when their new shipment comes in. Will update if issue persists or not.
Wish I would have done it 3 days ago. Might have been snagged another battery and leather case lol.
Sent from my LG-V495 using XDA Free mobile app

Owner's opinion on Xperia Z5 heat emission

As I am still undecided wether to buy the Z5 or look for another option, I'd like to get your personal opinions concerning the heat emission of Sonys newest device.
I have my Xperia Z for 2.5 years now and in my opinion, that phone gets pretty warm too (I play a lot of Hearthstone on my phone) but it isn't getting too hot to handle. I'd hate to look for another option since my Xperia Z was updated from 4.1.2 to 5.1.1 and my hope is, Sony keeps on updating all of its Xperia phones for at least 2 years.
To cut things short: please state which phone you used beforehand and give a number between 1 to 10 how warm you personally think the Z5 gets, 1 being cool and 10 being unbearably hot.

Ive had the Z1 and Z2
Z1 heavy use 3
Z2 heavy use 5
Z5 Heavy use 8

Nexus 5 - 3
iPhone 6 - 2
Xperia Z5 - 8
On my Xperia Z5 i downloaded the game Heroes Charge and when i started the game i got promted to do an update of 200mb. During the time the game downloaded the update on 200mb the top part of the phone got pretty warm. The whole download process took about 1 minute and it was quite worrying that it got so hot that quickly just by dowloading an update for about 45 seconds..
I instantly put the phone back in the box and will return it today. I don't dare to buy this phone for so much money just to experience difficulties in the future due to heat problems.

Mine arrived today - still deciding whether to keep it or not
Was taking a few pics, nothing too strenuous and it got pretty hot.
I dont recall the Z3 having the same issue.

The Z3 have a different CPU, that's why it doesn't get as hot as the Z5.
I'm really worried and havn't totally decided about sending the phone back. I really like the phone but it just gets so damn hot quickly. Is this something to worry about in the long run? I guess i can get used to the phone being warm, but not if it can cause any issues in the long run. I mean, i don't want a broken or really slow phone in six months..

Got to admit, the Z5 does heat up a lot quicker than any device I've used in the past
Z- 5
Z3- 4
Z5- 6
The Z5 does heat up quite fast but it doesn't get "hot" it gets warm and its fine to touch. On my Z3 the battery temp i usually around 30 degrees celsius, whereas my Z5 would average around 35 ~40 degrees celsius. again it gets warm but not "hot." Whenever you push the CPU or GPU the back will get hot, so downloading a bunch of apps etc... will push up the heat and its normal for any device.

LitoNi said:
Got to admit, the Z5 does heat up a lot quicker than any device I've used in the past
Z- 5
Z3- 4
Z5- 6
The Z5 does heat up quite fast but it doesn't get "hot" it gets warm and its fine to touch. On my Z3 the battery temp i usually around 30 degrees celsius, whereas my Z5 would average around 35 ~40 degrees celsius. again it gets warm but not "hot." Whenever you push the CPU or GPU the back will get hot, so downloading a bunch of apps etc... will push up the heat and its normal for any device.
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So the heat is nothing to worry about? No risk of reduced performance in the long runt etc?

HenrikSolna said:
So the heat is nothing to worry about? No risk of reduced performance in the long runt etc?
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Nothing to worry about, not unless you don't like the device to be constantly warm. It's much cooler here ok Vancouver right now so i can't say it would be around the same temperature for you.

I'm in Sweden, so it's pretty cold right now, around 5-10 C as highest during the day (40-50 F) so a warm phone is no problem, i would welcome it as a heat source when i'm outside
But i was just worried that the performance of the phone would be affected by the "heat issue", i really don't want to spend a lot of money on a phone where i might get issues with later on.

Bad things with overheat I have used Z5 for 5 days now. When the phone is charging it heats up badly and if you browse heavier web pages it starts to lag as does other apps and even launcher. If I run Antutu in these conditions it barely reaches 41000 score. I should mention than without charger pluged in (being colder or in other words regular conditions) it only reaches 50000 score, although, most reviews mentioned 60000 score. So this is my experience and I don't like it
Sent from my E6653 using Tapatalk
---------- Post added at 11:37 PM ---------- Previous post was at 11:28 PM ----------
BTW it heats up less because of GPU and more because of CPU usage. You can run 3D graphics for a long time and its not hot. But if you install anything or multitask (i.e. play music, run updates and browse) it heats up very quickly. And I repeat that I have only noticed it while being charged.
Sent from my E6653 using Tapatalk

Guys, never do CPU intense tasks while charging, that's def going to heat up the device and consequently reducing performance!
As long as the apps don't close because of heat, it's all fine and the phone getting warm shows that the heat drain pipes design is working. The Z3+ closed apps due to heat = unusable. The phone getting a bit warm to the touch is absolutely nothing to worry about. Remember, there's an octa core processor with 3 GB of RAM in that slim device
Based on that input, do you guys see FCs of apps due to heat?

i can tell Z5 is far better than my Z4 (Z3+) in terms of heat. consider heat issue is nvr exists.

Ok, so I have done some more thorough testing with Antutu and temperatures. I have tested the Z5 in room conditions (22 celcius). The device was cold (from standby) and I ran Antutu. Score 50000.
Then I ran Antutu again and again and again. With every test the device heated up and the Antutu score... droped down. It dropped down to 42302 until the Antutu app was "unable to verify" the result (kind of crashed).
Then I put it in a freezer (in a sealed bag of course). The Antutu score was 66609.
A you can see the heating up can redue the Antutu score by as much as 35%.
I believe this answers somebody's question whether the Z5's heatup reduces performance...

povilkami said:
Ok, so I have done some more thorough testing with Antutu and temperatures. I have tested the Z5 in room conditions (22 celcius). The device was cold (from standby) and I ran Antutu. Score 50000.
Then I ran Antutu again and again and again. With every test the device heated up and the Antutu score... droped down. It dropped down to 42302 until the Antutu app was "unable to verify" the result (kind of crashed).
Then I put it in a freezer (in a sealed bag of course). The Antutu score was 66609.
A you can see the heating up can redue the Antutu score by as much as 35%.
I believe this answers somebody's question whether the Z5's heatup reduces performance...
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Click to collapse
You can't really say it's 35% because the high number is when you had it in the freezer. Any phone in the freezer is by definition not a normal use case. Your findings of a 15% decrease is within normal variation for a phone being used constantly, especially when using a benchmark app constantly.
While it shows it definitely heats up, it's not as big of a difference as you make it sound IMO.
Sent from my Nexus 6 using Tapatalk

phobator said:
As I am still undecided wether to buy the Z5 or look for another option, I'd like to get your personal opinions concerning the heat emission of Sonys newest device.
I have my Xperia Z for 2.5 years now and in my opinion, that phone gets pretty warm too (I play a lot of Hearthstone on my phone) but it isn't getting too hot to handle. I'd hate to look for another option since my Xperia Z was updated from 4.1.2 to 5.1.1 and my hope is, Sony keeps on updating all of its Xperia phones for at least 2 years.
To cut things short: please state which phone you used beforehand and give a number between 1 to 10 how warm you personally think the Z5 gets, 1 being cool and 10 being unbearably hot.
Click to expand...
Click to collapse
Scientifically speaking this is a poor way to investigate the potential heat issue. Your primary concern is the temp and performance of the CPU/gpu, which does NOT consistently correlate directly with the temperature of the phone. In the case of the Z5, you have an actual heatsink combined with materials that are very good at transferring heat. The fact that the phone warms up quickly is actually a testament as to how well it dissipates heat from the CPU.
As for the antutu scores being worse, these scores are only useful so long as they represent real world performance. At the end of the day, you can still record 4k video for 30 minutes. I personally have not seen any slowdown related to heat. Downloading and installing programs does definitely heat up the phone, but the slowdown is because of the installation process and not the heat (in my experience) as this improves as soon as the install finishes.
I have done a lot of stuff with this phone and had no problems with performance, unlike my brothers g4 which can't navigate for long periods due to overheating. Yes the antutu scores show there is throttling, but I'm pretty sure every phone with this chip is designed to throttle to some extent. In my experience this throttling is irrelevant.

Every single core octa core phone throttles. This is my findings from 5 Antutu runs from identical cold starts (25C CPU temp) with all other apps closed on my three phones
Z5 : 62K - 54K (I won't agree with the 50K score he got on Z5 from the cold start, definitely lots of things were running in the background)
S6: 67K - 52K
Z3+: 57K - 46K
In terms of consistency, Z5 tops all of them. Considering the drama we've see earlier on other 810 based phones, this is a miracle Sony pulled on Z5. It could be the heat pipe or sw enhancements or both. No matter what - Z5 puts an end to that 810 drama.

Thank you guys for your answers so far! I took from your answers, the Z5 gets hotter than the original Z and some of you think that that's no problem and some think it's too hot ...
Ambivalence in regard to it's heat emission seems to be characteristic for this phone ... a lot of reviewers says it's ok while at least the same amount of reviewers says it's too much heat coming from the Z5 ... I'm still undecided ...

I've had the Z5 for a couple of days and even during the initial setup when it was updating and installing apps I was still able to use the phone normally and it didn't get too warm. I'm coming form the Z3 and I'd say they heat up pretty much the same - about 6-7 out of 10

Phone gets warm it's true, I remember my z1c going warm also pretty much the same 5-6 in the warm rank, but I tried a Xperia M4 last week and holy crap, that thing was super hot, I had to hold it from the bottom because the heat was unbearable, overall I am very happy with my new Z5, it's a great device

Got my one two days ago and must say gets pretty heated when I listen to music and play candy crush. Spoken to o2 and said that they would replace seeing as am in still my fourteen days cooling period. Am wondering that if I give it time will it change and settle?

z5 compact general operating cpu temperature

hello all.. I just wanted to understand how z5 compact cpu Temps are under normal usage (basic phone usage messaging, youtube video, basic camera usage, browsing and reading articles).. for example my oneplus one running on snapdragon 801 typically hovers between 33-38 for majority of the tasks.. I understand no phone is the same.. different people have different experiences...Through this thread I would like draw some patterns and conclusions.. thanks!

Just installed a cpu temperature monitoring app to check.(cpu temperature by mooncakes from playstore)
From what I can see (if it shows the correct sensor) it hovers between 28 - 33.
Using a "regular" Z5, though.

While browsing/messaging/youtube for prolonged periods I am usually at around 35-40c.
Gaming with 2d usually stays at around 40c and 3d is at around 50c.
Installing and updating apps usually generates most heat with temps of around 50c+ but fortunately its not something that happens often.

DaNiC700 said:
While browsing/messaging/youtube for prolonged periods I am usually at around 35-40c.
Gaming with 2d usually stays at around 40c and 3d is at around 50c.
Installing and updating apps usually generates most heat with temps of around 50c+ but fortunately its not something that happens often.
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Maybe u could add which app you use, I edited my post too.
Also, I think while shooting 4k video and using the AR effects for prolonged time the temp wil go above 50°c (I'll have to test) but the sd810 probably handles more.
At my old Z running a snapdragon s4 pro shutdown temperatures are around 78°c or so.

thanks guyz.. again.. just to clarify.. we can exclude the extreme cases.. like shooting 4k and prolonged gaming.. these are known to stress the cpu.. I am curious to understand how bad it is during normal usage.. hopefully this will allow others to make informed decisions.. I have mine coming tomorrow!

yubeie said:
thanks guyz.. again.. just to clarify.. we can exclude the extreme cases.. like shooting 4k and prolonged gaming.. these are known to stress the cpu.. I am curious to understand how bad it is during normal usage.. hopefully this will allow others to make informed decisions.. I have mine coming tomorrow!
Click to expand...
Click to collapse
Well, under normal conditions nothing to worry about. (in my opinion not even under heavy load, Z5 is supplied with a dual heatpipe - but that you'll probably already noticed lol)

langeveld024 said:
Well, under normal conditions nothing to worry about. (in my opinion not even under heavy load, Z5 is supplied with a dual heatpipe - but that you'll probably already noticed lol)
Click to expand...
Click to collapse
z5c doesn't have the heat pipe based cooling.. hence the worry

yubeie said:
z5c doesn't have the heat pipe based cooling.. hence the worry
Click to expand...
Click to collapse
? It obviously has.

yubeie said:
z5c doesn't have the heat pipe based cooling.. hence the worry
Click to expand...
Click to collapse
Oh I thought it had.
Then I understand

only the z5 and z5p have the heat pipes.. z5c doesn't unfortunately.

langeveld024 said:
Maybe u could add which app you use, I edited my post too.
Also, I think while shooting 4k video and using the AR effects for prolonged time the temp wil go above 50°c (I'll have to test) but the sd810 probably handles more.
At my old Z running a snapdragon s4 pro shutdown temperatures are around 78°c or so.
Click to expand...
Click to collapse
I'm using the Cputemp app which has a cool option that adds the cpu temperature to the header of the phone (where the time and battery life reside) so the temperature is constantly under check.
I'll add also that battery temperature is usually at around 30-35c and if you're doing something heavy for a long while it will rise to 40-43c

yubeie said:
only the z5 and z5p have the heat pipes.. z5c doesn't unfortunately.
Click to expand...
Click to collapse
What **** are you talking? It has, for gods sake.

Premium has dual heat pipes as rest has only single i guess.
My temps are between +17 - +38 last 5 days (no gaming)
Idle temp at night usually +20 or little bit under.
Web browsing get temp usually up to +35

mele80 said:
Premium has dual heat pipes as rest has only single i guess.
My temps are between +17 - +38 last 5 days (no gaming)
Idle temp at night usually +20 or little bit under.
Web browsing get temp usually up to +35
Click to expand...
Click to collapse
No, all 3 models have dual-heatpipes. Seriously, what the **** is up with you guys? The last model with 1 heatpipe was Z4.

Tommy-Geenexus said:
No, all 3 models have dual-heatpipes. Seriously, what the **** is up with you guys? The last model with 1 heatpipe was Z4.
Click to expand...
Click to collapse
Don't be like that

guyz.. easy.. let's keep the discussion civil... its okay... if a person is right or wrong.. there is absolutely no need for cursing.. I went through https://www.ifixit.com/Teardown/Sony+Xperia+Z5C+Teardown/53206 and there is no sign of it.. you can look at z5 or z5p on the other hand and you'll find it.

check out step 12 through 14.. https://www.ifixit.com/Teardown/Sony+Xperia+Z5+Teardown/52300.. this one uses it.

I already posted it in a an thread, but here it seems more relevant.
I made a small video showing my Xperia z5 compact overheating.
Just with browsing the CPU can reach temperatures of 50 - 60° in 7 minutes.
This happens while browzing at other sites too. CPU throttles bit by bit and it gets really warm.
This makes the back of the phone very very uncomfortable to hold and i can't imaging how hot it will get in the summer or under the sun.
Can you please give me a feedback on that because I am thinking of returning it.

There is something wrong with the cpu temp app that you are using..I just tested two apps simultaneously on my oneplus one...The app you used reported 46C while the "cooler master" app reported 33.3c attached is the screenshot!
There is no way my phone was at 46 because..the phone pretty cool..So I suspect the app is not reporting it right...not sure where it's getting the info from.
https://www.dropbox.com/s/3iq8arqy5fcupex/Screenshot_2015-12-21-14-25-10.png?dl=0

Okay.....I performed extensive testing in the past two days regarding the temps to understand the behavior....Here are the details..
I used my old oneplusone and z5 compact to compare 1. perceived heat (based on touching the device) and 2. actual temp readings from the app devcheck pro.
Regarding temp readings, I monitored both CPU as well as battery temps. I generally felt, the "perceived heat" comes into play only once battery heats up as this lines up along the back of the phone.
Test performed: Used flipboard and news republic apps for 5-6minutes. Then opened chrome dev browser app and loaded "cricinfo.com" website. This web-page is flash intensive and has tons of content. I kept repeatedly navigating through the webpages and accessing links. The idea was to perform intensive web-browsing.
Note that both phones had TPU cases on them.
Here are my findings:
-Both the phone's CPUs start off at 37-40c and gradually hit 55-65c. Interestingly, I noticed that oneplus one at times hit almost 73-75c!! whereas z5c never hit this limit (perhaps due to thermal throttling???).
-The battery temps steadily rose from 27c to 38-40c.
Attached is a screenshot for your reference.
-On both phones, the temps rose almost around the same time (about 7-10mins into the test). I felt at some-point z5c was being throttled to maintain temp thresholds. However, I did not notice any "visible" performance drops.
The key thing to note: The back of the oneplus one was slightly warm. Whereas z5c was pretty warm (although not uncomfortable). I think this is exactly where the user gets worried, thinking the phone is overheating. The problem is the glass back as opposed to the padded material of the oneplus one. The glass surface of z5c almost immediately starts conducting heat and quickly heats up.
After letting the phones cool, almost within 10minutes, both the phone temps dropped pretty quickly.

Agressive Thermal Throttling

I've been running benchmarks on this phone.
I've noticed a couple of things.
Thermal throttling on this phone starts at a very low threshold and is very aggressive.
Supposedly the maximum frequency of the large cluster is 2.45 GHz
At room temperature my phone never reaches that performance.
Here is a copy of the thermal-engine.conf, pulled from system/etc.
As soon as you start to benchmark the speed starts dropping:
At room temp I get Antutu ssores in the 130-150K range.
If the phone has been in a very cool room I get 160K numbers.
If I put it in a very cold environment for a few minutes I can get numbers in the 178K range.
Back to back runs plunge performance.
So it does not surprise me that the phone freezes at times.
Not happy that the phone throttles like this.

I have also found that if the phone gets to 44C then the throttling is so bad that a LG G4 or Samsung Galaxy S6 will outperform this phone.
So the thermal-engine.conf has this phone crippled.

This is speculative, but I wonder if overheating was the cause of the release delay. If so, perhaps this was the workaround they implemented to get the device out. That said, if throttling is the culprit then it could explain why my phone runs like an Evo3D much of the time. Generally before use, it's in my pocket, which is body temperature and the phone is always warm. Maybe even pocket-temp causes throttling?
Oh well, return initiated yesterday, awaiting response from CS - I just can't stand to take a chance a potentially crippled device. While the updated did increase the responsiveness of the screen a slight bit, I didn't see an overwhelming change that put this in the category of other devices running similar hardware. Back to the OP3...

cadbomb said:
This is speculative, but I wonder if overheating was the cause of the release delay. If so, perhaps this was the workaround they implemented to get the device out. That said, if throttling is the culprit then it could explain why my phone runs like an Evo3D much of the time. Generally before use, it's in my pocket, which is body temperature and the phone is always warm. Maybe even pocket-temp causes throttling?
Oh well, return initiated yesterday, awaiting response from CS - I just can't stand to take a chance a potentially crippled device. While the updated did increase the responsiveness of the screen a slight bit, I didn't see an overwhelming change that put this in the category of other devices running similar hardware. Back to the OP3...
Click to expand...
Click to collapse
So the device won't get really hot.
It won't even get that warm unless it's charging.
If you put it on a charger, it will be throttled after about a minute.
If I run Antutu and start out with the device sitting on a table in a cool room (too many conditions), I can get a score of about 167K.
If I sit it on a baggy of ice, I can get a score of about 177K but never unless the device is artificially chilled.
But if you run Antutu back to back or GeekBench and look at the temp, as soon as it hits 43C, you hit a wall.
The device won't heat up more than that but it's now running only slightly faster than a 6P and slower than a Pixel XL or Moto Z.
I don't want to pay $850 (yes that much if you include the extended warranty and tax) for a marginal device.
If I had root, I would have played with the thermal-engine.conf. It can't be right.
You go from full performance to half in a matter of 4 degrees C.
I have looked at other files for other devices and I've never seen anything that aggressive.
Even the 6P was not that bad.
I have an iPhone 6s (work) and no matter ho many times I run the test I always get about the same numbers.
I have my phone charging and I ran the test and I just got 115K. So on a charger the performance is 65% of max.
This is why I'm sending it back. Might as well be a LG G6.

tech_head said:
So the device won't get really hot.
It won't even get that warm unless it's charging.
If you put it on a charger, it will be throttled after about a minute.
If I run Antutu and start out with the device sitting on a table in a cool room (too many conditions), I can get a score of about 167K.
If I sit it on a baggy of ice, I can get a score of about 177K but never unless the device is artificially chilled.
But if you run Antutu back to back or GeekBench and look at the temp, as soon as it hits 43C, you hit a wall.
The device won't heat up more than that but it's now running only slightly faster than a 6P and slower than a Pixel XL or Moto Z.
I don't want to pay $850 (yes that much if you include the extended warranty and tax) for a marginal device.
If I had root, I would have played with the thermal-engine.conf. It can't be right.
You go from full performance to half in a matter of 4 degrees C.
I have looked at other files for other devices and I've never seen anything that aggressive.
Even the 6P was not that bad.
I have an iPhone 6s (work) and no matter ho many times I run the test I always get about the same numbers.
I have my phone charging and I ran the test and I just got 115K. So on a charger the performance is 65% of max.
This is why I'm sending it back. Might as well be a LG G6.
Click to expand...
Click to collapse
Good to know, and thanks for the thorough diagnostic! Even with rooting and changing the throttle configs, I fear a voided warranty and bricked phone if it's a design flaw and not a software bug. It's just not worth it for me to wait and see when there are other new and shiny things just around the corner. *squirrel*

cadbomb said:
Good to know, and thanks for the thorough diagnostic! Even with rooting and changing the throttle configs, I fear a voided warranty and bricked phone if it's a design flaw and not a software bug. It's just not worth it for me to wait and see when there are other new and shiny things just around the corner. *squirrel*
Click to expand...
Click to collapse
I'm pretty sure it's a mistake in the thermal-engine.conf.
I actually contacted them and submitted my information.
You don't throttle from 39-40C down to 50%
I've worked designing chips for better than 25 years.
If the 835 is more efficient than the 810, then there is no need for anything that aggressive.
Anyway, I asked for a RMA and they are sending a the boxes/envelopes.
No cases is a big deal for me also.
Since I'm already at $900 for the phone and camera (taxes and insurance). I might as well give the X a look.
Yeah, it costs more but if I'm already at $900 another couple of hundred isn't going to matter.
Unfortunately, I have to go back to my LG G3 since my 6P was sold and shipped last week.