Hello all, I've been away from Android for almost 4 years. I've been reading about the Snapdragon 820 and I'm not understanding why Samsung has 2 cores at one speeds and 2 at a lower clock speed. Is there a reason for this? Seems kinds strange seeing as the 820 is capable of 2.2Ghz on all 4 cores. Just trying to understand why this is and if this makes any difference in performance.
Thanks!
However they are using them, the primary reason is almost certainly reduced battery consumption, with reduced heat production a strong secondary reason.
If I was guessing, I'd say the low clock cores are handling things like doze mode and the always on screen.
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rcobourn said:
However they are using them, the primary reason is almost certainly reduced battery consumption, with reduced heat production a strong secondary reason.
If I was guessing, I'd say the low clock cores are handling things like doze mode and the always on screen.
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Thanks, that's what I figured. So I'd the SD820 a quad core or 8 core SoC? I'm seeing conflicting things about this all over. I do know the Exynos chip is 8 core SoC.
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It is a 4 core cpu but they are divided in 2 clusters and work independently one of the other. The cluster clocked at 2'2GHz is tweaked for high performance and it is dedicated for heavy stuff. The cluster clocked at 1'6GHz is tweaked for lower power consumption and might be more efficient at lower clocks than the other cluster. It is not a Samsung thing, the SOC was designed like this by Qualcomm, you probably could not run all 4 cores at 2'2 without draining too much power and heating up.
Related
Okay so I was busy playing Osmos HD (Awesome Game) and my phone started freaking out. I got a notification, Telling me that my phone was over 60°C and was going to power off until the device was cool enough so that no permanent damage is done. When I turned the device back on I noticed that I had a few twitchy pixels that were flashing like the notification led only more eradicate, Over the area where the main heat source was. Its been 2 hours now and my battery temp is at 49.1°C. And the device is finally stable enough to use, Although I still have the group of twitchy pixels.
I am outraged at the fact that whilst playing a game (Not whilst being charged) that the phone can get this hot, I mean can't HTC find a way to dissipate the heat better so that the phone doesn't fizzle and burn itself out thanks to the main feature of it (Tegra 3). I'm going to wait and see weather the GS3 is any good, But until then I'm going to put some aluminum tape on the inside of a case so that the device can dissipate heat better, the aluminum acting somewhat like a heat sink.
Now I don't know weather the temperature is accurate on the CPU but f**k me sideways that's not right!
Stuart.upton666 said:
Now I don't know weather the temperature is accurate on the CPU but f**k me sideways that's not right!
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Doesn't surprise me atall mate, mine has been doing the same since the day I bought it, right ****ing disappointment this phone, wish I waited for the SGS3.
I suspect you may be having the same issue I did. The gmail app has a bug in it which can lead the background sync service to sit chewing on CPU, if you use gmail try to disable sync and stop using the app (you can 'Disable' it too), use HTC mail instead.
Stuart.upton666 said:
Now I don't know weather the temperature is accurate on the CPU but f**k me sideways that's not right!
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There's your problem: "Performance" governor.
It will run your phone at full speed all the time. Switch it to "On Demand" or "Interactive" to give your phone a break.
It's up to you.
mine also heating
My cell also got heated ALOT once
oh boy
OK All HTC One X Tegra 3 Owners should understand that Tegra 3 is a variable SMP architecture
Meaning: The chip is meant to scale up and down and into the maximum of its thermal limits and out, this is the direction NV is taking and you can see it in their latest Kepler GPUS
which means never ever lock the clocks!
You have chosen Performance governor which locks it at a minimum of 1.4ghz what is worse is that in that mode, 2 cores are even disabled so you are actually loosing performance and not gaining!
run glowball in performance governor and watch how the frame rate hits bottom
Modes:
1.5ghz = single core
1.4ghz = dual/three cores
1.2ghz = quad cores
Governors
OnDemand = can use all the cores and all the steps, conservative and power efficient
Interactive = uses all the cores and all the steps but stays in top speeds more often
Performance = locks it to 2 cores @ 1.4ghz
and finally the GPU can run up to 533mhz depending on the CPU clock, this is a very high range for a 40nm chip and hence it needs to ramps down when its not needed to cool down!
You bought Tegra3 knowing its a quad 40nm SOC, this the thermal envelope of this SOC no surprises here!
To add some perspective to your drama, use an iPad3 for few minutes and you will understand quad CPU or GPU in a mobile device this season = heat = ITS OK
I dont understand why all the nagging when both HTC and Apple said these are normal operational temps during heavy use
check my guide in here to fine tune your HOX http://forum.xda-developers.com/showthread.php?t=1664391
Oh boy, you're a god. HTC should hire you. Google too. And Apple.
hamdir said:
oh boy
OK All HTC One X Tegra 3 Owners should understand that Tegra 3 is a variable SMP architecture
Meaning: The chip is meant to scale up and down and into the maximum of its thermal limits and out, this is the direction NV is taking and you can see it in their latest Kepler GPUS
which means never ever lock the clocks!
You have chosen Performance governor which locks it at a minimum of 1.4ghz what is worse is that in that mode, 2 cores are even disabled so you are actually loosing performance and not gaining!
run glowball in performance governor and watch how the frame rate hits bottom
Modes:
1.5ghz = single core
1.4ghz = dual/three cores
1.2ghz = quad cores
Governors
OnDemand = can use all the cores and all the steps, conservative and power efficient
Interactive = uses all the cores and all the steps but stay in top speeds more often
Performance = locks it to 2 cores @ 1.4ghz
and finally the GPU can run up to 533mhz depending on the CPU clock, this is a very high range for a 40nm chip and hence it needs to ramps down when its not needed to cool down!
You bought Tegra3 knowing its a quad 40nm SOC, this the thermal envelope of this SOC no surprises here!
To add some perspective to your drama, use an iPad3 for few minutes and you will understand quad CPU or GPU in a mobile device this season = heat = ITS OK
I dont understand why all the nagging when both HTC and Apple said these are normal operational temps during heavy use
check my guide in here to fine tune your HOX http://forum.xda-developers.com/showthread.php?t=1664391
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Click to collapse
I have a doubt , whether enabling two core and disabling the other won't cause damage to the enabled one as they will be overclocked when performing some high end task ?
I am afraid of that and not disabling the two . But I like to use if they save battery.
Sent from my HTC One X using Tapatalk 2
forumhookersdotcom said:
I have a doubt , whether enabling two core and disabling the other won't cause damage to the enabled one as they will be overclocked when performing some high end task ?
I am afraid of that and not disabling the two . But I like to use if they save battery.
Sent from my HTC One X using Tapatalk 2
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Overclocked? They will run at a maximum of 1.5GHz, regardless of how many cores are active, unless you overclock them.
I have my One X constantly set to dual core mode and haven't experienced any problems as of yet. Quad-core is massive overkill at the moment on Android and is completely unnecessary.
Meltus said:
Overclocked? They will run at a maximum of 1.5GHz, regardless of how many cores are active, unless you overclock them.
I have my One X constantly set to dual core mode and haven't experienced any problems as of yet. Quad-core is massive overkill at the moment on Android and is completely unnecessary.
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Won't they get destroyed as they are running at maximum clock ?
Do they save battery , enabling only two cores.
Sent from my HTC One X using Tapatalk 2
forumhookersdotcom said:
I have a doubt , whether enabling two core and disabling the other won't cause damage to the enabled one as they will be overclocked when performing some high end task ?
I am afraid of that and not disabling the two . But I like to use if they save battery.
Sent from my HTC One X using Tapatalk 2
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Setting it to 2 cores is really pointless for batery savings since it almost never goes to 3 or 4 cores unless you play graphically intense games.
Besides that, yes it is safe.
forumhookersdotcom said:
Won't they get destroyed as they are running at maximum clock ?
Do they save battery , enabling only two cores.
Sent from my HTC One X using Tapatalk 2
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No, I highly doubt it. 1.5GHz isn't the maximum this processor can physically reach anyway, it's just the cap that has been implemented. It's the Battery and CPU heat you need to be worried about, these can cause real problems. Fortunately, disabling 2 of the cores also reduces the Battery temperature quite drastically. I've not done much testing with CPU temperature though, but it certainly doesn't seem to increase it.
As for battery life, I've not noticed a huge increase in battery life but it does seem to be a little better. This could just be a placebo effect though
Meltus said:
No, I highly doubt it. 1.5GHz isn't the maximum this processor can physically reach anyway, it's just the cap that has been implemented. It's the Battery and CPU heat you need to be worried about, these can cause real problems. Fortunately, disabling 2 of the cores also reduces the Battery temperature quite drastically. I've not done much testing with CPU temperature though, but it certainly doesn't seem to increase it.
As for battery life, I've not noticed a huge increase in battery life but it does seem to be a little better. This could just be a placebo effect though
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I'll add to meltus post.
CPU will only hit 1.5 on 1 core, 1.4 on 2 cores and 1.2 on 4 cores.
CPU is good upto 90c so CPU temp isn't a worry but HTC seem to think that 48c is over heating for the battery where it is ok up to 60c.
Sent from my HTC One X using xda premium
Is there any other app to turn on 4 core when games ?
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forumhookersdotcom said:
Is there any other app to turn on 4 core when games ?
Sent from my HTC One X using Tapatalk 2
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This goes along with a thread I was in earlier. You could use tasker to create a profile to enable 4 cores (and in the case of our other thread, the interactive governor) when playing a game, then disable 2 when exiting the game. You can set up Tasker to do all kinds of cool things for battery management and all automated too.
Hey Guys,
i have a problem with my Nexus 5X since weeks and now I think I have founded the problem. On daily usage, in games or in Benchmarks: the two big Cores are always stopped. Bit I don't know why. I have tested it with some Games, Geekbench and CPU-Z. Can anyone help me?
Thanks
chris.k00 said:
Hey Guys,
i have a problem with my Nexus 5X since weeks and now I think I have founded the problem. On daily usage, in games or in Benchmarks: the two big Cores are always stopped. Bit I don't know why. I have tested it with some Games, Geekbench and CPU-Z. Can anyone help me?
Thanks
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Click to collapse
The thermal throttle stops the big cores when they reach a certain temperature. It's "normal" behavior on this cpu.
But they are stopped all time. When I Power on the device and start a big game, when I wake up the device after a while and play a big game... ever! Temperatures are round about 55°C
If you're on one of the Android N Dev Previews then it is probably the well known bug that shuts the big cores off. If you're on Marshmallow then it is most likely thermal throttling. I think the big cores turn off at about 45C.
Okay. But why does my device heat up so fast? I have read a few Tests and the Processor never gets hotter then 42°C.
chris.k00 said:
Okay. But why does my device heat up so fast? I have read a few Tests and the Processor never gets hotter then 42°C.
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It's your use mostlikely, e.g. camera (, cpu intensive games, benchmarks etc) takes all the cpu power possible, that'll heat up your device into range of thermal throttling in no time, while one can browser normal websides for hours without any signifcant heat building up.
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I think it's a general misunderstanding of how a big.little cluster cpu works. Those aren't 6 equal cores, the big ones are (most of the time) just there for short term boosts and otherwise drag down performance overall, especially when the cpu heats up. I can see a much higher use of the big cores e.g. when loading websides compared to gaming, where it comes down to how the game can run on the remaining cores (little ones) after a few minutes.
But the Cores shouldn't heat up after a few seconds, should they? And they are simply alsways off.
I have tested it with the Geekbench 3, Smash Hit and the Camera App. The results like the temperature and the clock Speed came from CPU-Z.
My Standard result of the Geekbench is 650 and 2500 points. The two big Cores are stopped and the temperature is round about 50°C
The Standard witch I have found in the Internet was 1300 and 3600 points. The temperature shoult be round about 42°C-44°C
I was just look at the specs of the Pixel, and the cpu. Just a question about it. Isnt the quad core 2.7ghz cpu in the nexus 6 better then quad core 2x2.15ghz and 2x1.6ghz?
No its an old cpu architecture.
The answer is GHz isn't everything. The design of the cores is the most important thing. A hert is a wave of energy and a Giga-hert is 1,000,000,000 waves of energy. 2 CPU's could have the same amount of hertz, but still differ greatly when it comes to performance. In this case, the Pixel's cores can process more information per cycle(Hz).
Picture having two sets of 4 dots that you connect with lines to form two squares. When you connect the lines on both of them one takes less time to complete than the other even though you drew the lines at the same speed. How is that possible? One set of dots are closer together.
Hey guys, for those Mi Max 1 users with the snapdragon 650.
Does the phone tend to heat up during long gaming sessions e.g. Pogo?
Does it throttle often?
Ambient temperature is around 35 Degree Celsius.
windwaver said:
Hey guys, for those Mi Max 1 users with the snapdragon 650.
Does the phone tend to heat up during long gaming sessions e.g. Pogo?
Does it throttle often?
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Click to collapse
S650 does throttle down but not much. 1.4 GHz is sustainable for big cores on long runs and 500~550 MHz for a GPU but this isn't significant. The S652 can't hold all 4 big cores on more than one GHz in extended use while everything else is the same as with S650. I don't play Pogo but games I play & in general it doesn't throttle often.
Mine heats up only when charging and using it at the same time on heavy tasks. If only charging it won't heat up. If only using heavy tasks it won't heat up. If I used slower charger than QC 3.0 it would probably be fine.
Thanks for the reply folks. The 650 looks to be the safer option in this case. Another way is for me to get the 625 with 8 little cores which doesn't overheat at all.
windwaver said:
Thanks for the reply folks. The 650 looks to be the safer option in this case. Another way is for me to get the 625 with 8 little cores which doesn't overheat at all.
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quick charging while using mi max 2 will still overheat the device
sd650 overheat so much here , when playing Mobile legend max setting with 60fps (high framerate mode) . battery draining more too.