The Cortex-A73, a CPU that won't overheat - Gary explains
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- Опубліковано 28 тра 2016
- Full details: goo.gl/Zgxccx
ARM has announced a new CPU core design, the Cortex-A73. It is faster, but more importantly it has great power efficiency during periods of sustained usage.
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Errata: Before anyone else mentions it, I should have said Kirin 955 not Kirin 95... and for those being really pedantic the Exynos 8890 is built on 14nm and not 16nm...
Then don't get them wrong if you care enough to write a reply.
yeah, I was about to say that! :)
Great video, I would like to see more of you sir.... that fine tech nuances is what I live for! Although your whole time is good. :)
There is a playlist here: ua-cam.com/video/roeZs-eL-lw/v-deo.html
:-)
+Gary Sims Thank you, I appreciate. :)
l meant 'team' n not 'time' in the above comment. Swiping on the keyboard n not checking before posting can cause some worries sometimes. -_-
thank so much
smart guy! xD
Loving these Gary Explains videos! Keep em coming sir Gary
Thank you Gary for the awesome explanation. Can't wait to see devices with the Cortex A73 CPU architecture.
Excellent.. you always produce very useful material!
I love how your explanations keep in mind the overall audience. Even a lay man can perfectly understand what you said, along with precise explanations about the entire subject. Hats off, amazing video!
Your videos have improved a lot Gary, all the best to you.
Great vid Gary, keep them coming. Love the tech nature of your videos!
I like these in depth videos that go deep into the technology and are very detailed. They do good explanation's and they have good slides and good evidences.
jesus christ, an ARM A7(x) series CPU with 10nm and 2.8ghz, and it can hold that! that is remarkable!
Nice work Gary!!. Or should I say professor Gary.. ur explanations are so detailed.. and people really need to know the kind of chipsets powering their mobile devices before purchasing any smartphone in the stores
Thank you for this amazing video Gary 👍🏻
Thanks For The Explination.
I like the deep tech explanation video's. The file system thing was useful and this is very interesting. Keep up the good work!
What a good, well detailed video sir! More please.
This is really amazing. Qualcomm should pick some of these up for their next 8-series SoC
Thanks a lot for the awesome explanation. I find your Videos very insightful and I enjoy them a lot :)
ur one of the best android authority guy sir
please make more videos like these🙏
Good Videos Gary keep them coming ..
I really like Gary Explains videos. What amazes me this year about phones is the amount of mid renge phones with Qualcomm 28nm SOCs 652 and 650 from sony, samsung, xiaomi and others. It turned out that those chips perform incredibly well, they are great at utilizing energy, no overheating, when you compare performance with Snapdragon 820 chip, it is obvious 652 and 650 open apps fater, multitasking is better, battery utilisation is better. I understand some of the high end phones have QHD res displays and high performance gpu drains batter, but I've got a feeling they don't perform as quickly and optimised as mid renge phones with 650 and 652... Sony Xperia X with 28nm 652 opens up every app faster than HTC 10 and Galaxy S7 820 and battery life is the same if not better... And one more thing about 2016 chips, I really expected more from Mali-880 compared with 760.
You cant possible compare the snapdragon 820 with the 650 and 652. The 820 is a fucking beast. granted the 652 is a pretty impressive chip but cant really hold a candle to the 820 (maybe in power efficiency).
Drunk?
+CasualViewer3 actually Sony xperia x is faster than htc 10
***** hey im not picking on htc 10 or something like that its just the only speedtest i saw with a 820 device
On a level playing field, a SD820 will embarrass the SD650 & 652 while consuming a VERY similar but slightly larger amount of power, that's rather impressive but the chips are designed differently, the 820 designed for the upmost performance and quality Qualcomm can produce right now, it's tuned for that performance edge. Those mid range chips, while they perform very well and are quite power friendly, they don't actually hold a candle to the 820, got to remember the 820 has much more powerful components than these lower end chips, it's perfectly fine to allow it to get a little warm. As far as I'm aware the SD820 actually exceeds the power envelope for mobiles at peak performance, hence why it'll get warm and eventually throttle, all normal stuff. Nothing against the 650/652, just have nothing on the 820 as they shouldn't.
nice explanation sir keep it up
again another great video Garry thanks.
gary a question. for devices like the shield where they do not need to worry about battery life wby do they do big.little? they could make it powerful with all big cores. i mean power draw would be more, but it would be much faster
The NVIDIA SHIELD Android TV Box is a special case. I guess NVIDIA needed to look at the projected volume shipments and decide if it should try and build a special processor just for the SHIELD, or design a generic mobile processor like the X1 which could be used in the SHIELD and in other devices.
There are other factors like CPU usage vs GPU usage. Is the SHIELD actually running it quad Cortex-A57 cores at 100%, I doubt it.
very valuable information !!
I love these technical videos
Great video. Thank you
Good video Gary , Thank you ...
wonderfully explained.........
Hello gary loved you video. But what about the Cryo cores on the s820 ? they show excellent performance specially in single core result. Are they not better than A72 cores at this point of time ? where do these cryo cores fit in the list of high performance cores :-)
I will be doing a SoC showdown comparing all the current leading cores soon... I just need to finish my testing of some devices...
looking forward to it :-) since I think cryo is really a very fast processor, on par with apple's core.
Great video Gary!
damn I don't know how I missed this video. once again Gary thanks for a great video . for a 64 year old geezer I look forward to seeing your videos!! you present it in layman's language, with a concise and natural flow in your presentation of the video. once again thanks for the great video.
I wonder when is the end of silicon? Will 10 nm be the last process shrink?
Thank you Gary for a well explained issue in plain english.
Please say us what is your video gear for your channel please
_Sounds pretty COOL for technology_
Kirin 960 16 nm FinFET Plus ARMv8-A Cortex-A73
Cortex-A53
big.LITTLE. Not sure if Huawei have released a device based on this yet.. but i might well buy it.
Would love to see a Quad Core with 2+2 A73 similar to SD820 Kryo cores. Since a Quad core A73 would take around same space as Octa core A53.
With the new 10nm architecture is possible to get big.LITTE clusters such as 4 x Cortex-A72 and 4 x Cortex-A73. I think one of those SoC with that configuration will be the Snapdragon 835 (stock cores with more L2 cache in order to represent the Kryo architecture).
i think the Cortex-A73 is a replacement for the A72. they are both primarily big cores.
in a big.LITTLE arrangement you should expect to see 2xA73 and 4x A53 or top tier premium 4x A73 4x A53.
But some will have Cortex A35 as the little core (even more efficient than A53 but less performance)
can't wait to see Qualcomm come up with new SOCs with cortex A73 processor
Gary Explains is amazing!
Great video. Technology is amazing.
Great video.
and how are they going to implement this? it will be already throttled?
I watched the video to see that, but in only had a video version of the press release.
I don't understand the question, what do you mean by "implement it," the Cortex-A73 is already designed and with ARM's partners. Why do you think it will be already throttled?
This is interesting, but I was thinking. What if like you said in another video about custom cores vs ARM cores.
If the instruction sets; Insets, are kept at different "lvls" or layers that way the chip, handling their insets, won't heat up as much. Not as fast. They'll compute the instruction sets faster, thus producing less heat.
Also another way could be to coat, a thing layer to cool off key target areas of said 'RISC' chips.
See my thinking is, there are what usually 4, so quad, cores in the common risc. Or 8. Octa.
So my thinking is. Get each other core to handle the sets. Once those turn off. Get the other two opposite cores to do the work. Then reapeat. On n off, on n off. Its be much more efficient that way. Also way faster. It'd boost speed really. As for temp it should, should, cool it down. Temp is always the tricky part.
An example of what I mean is here:
Core 00 handles the first ser of segments of the split instructions set.
Then Core 01: Stays off (cooling).
Core 02?: Handles the second half of the segmented instructions set that will later be recombined with its other half, that Core 00 is handling.
Then the next inset, comes along, Core 01 and Core 03 handles these sets. Then they are put together and so on.
Instructing, and also designing the SoC that'll be integrated into the silicon this way will be the most important part. If its not designed correctly. It won't work, correctly.
Wow interesting review
I primarily use iOS but really like this guys videos, probably more so than the likes of MKBHD & Linus tech tips etc. Great channel
thanks
which smartphones have cortex A73.
What if the performance is the same with Samsung Mangoose architecture ?
Do a video on Snapdragon 835. Does the Kryo in their is A72 or A73?
A Karim Siddiqui I think it will be with both cores (without any efficiency cores due it's small architecture)
A Karim Siddiqui
I think is A73 because similar performance benchmark.
So its like my pentium 3 using a big cpu heatsink 15 years ago and intel M processor not needing heatsink now a day.
Please make a comparison review between S7 edge and mi5
I love these videos
nice video....
Maybe, some day in future we will have a technology that will absorb all the heat and convert it into electric current which will be stored back in the battery!
thermal electric pad ?
However, it would be like putting a coal based generator in a phone, so it is not coming any time soon LOL
+Kaushal Mehta had you ever heard thermal electric generator pad ?
That is a very good idea. Someone should definitely run this by them because what if this is not being worked on for smartphones because no one thought of it in the industry.
bad idea absorbing "all the heat" would cause literal coldness to the phone and that would damage performance then by converting energy will be lost so ultimately "all the heat" wouldnt be used
wait, so when it thermal throttles it lowers the cpu performance for example power usage and thus lowering the cpu cores frequencies? a normal desktop cpu does that as well, i see nothing new here just means what it always does thermal throttle leading to lowering the power consumption means the lower the power consumption the lower the heat it outputs until its back to normal and so on
What is the "it" in your comment, the Cortex-A73 or the Cortex-A72?
***** the cortex a73
Iwo Ruuzz So the idea is that the Cortex-A73 doesn't need to throttle as its heat output for sustained workloads is the same as its peak output. If the phone's chassis is designed correctly to dissipate that heat then the sustained performance should be almost the same as the peak performance.
***** yeah i did realize that after i watched the whole video, but still thanks
Let the knowledge fill my brains.
Redmi note 3 or refurbished Galaxy note 4 or blu vivo 5 or any other phone ? same price range
+Kha h one plus 2 , or moto x pure
Kha h but the moto x is more pricy
very much impressed by cortex a72 .using on redmi note 3 really very cooler device
So a Digital PID controller changing the CPU frequency, neat.
As the nm process decreases, they can reduce the voltage; thats why the overall power goes down.
Qualcomm said that they resolved the overheating issue on the SD810 and they probably have a different meaning on what overheating is. I honestly think this is just a bait and switch although the 820 on the S7 runs superbly even on extended gaming due to the cooling pipes perhaps.
+hebbocake When I was able to use the SD variant it was great especially compared to sd810 on the n6p. though I didnt have it for days, I have the exnos variant though.
Finally Gary laying down some science.
you didnt explain the tech behind allowing the chip to produce constant amount of heat output.
my s7 needs that gets hot when playing a lot of games lol
Thank god for you Gary, the rest of the staff don`t know squad about the real deal.
They only care about aesthetics and camera quality.
So where's the actual demo of the unit? Which, BTW is not a diagram and its coming from the tested unit. Plus a thermal reader.
eh? There is no silicon yet.
***** I was hoping that you could show me a demo. And not a diagram.
Foxtrot November I hope to when the actual chips exist!
nice
for me all this means, better to keep my note 4 for another year before upgrade :)
Talk about the mail g71mp8 GPU
this is great news..now if samsung combines this with there water-cooling system in the S7..we would get a phone truly flawless.
Watching this in 2019 with phones that have heat sinks and fan addons :)
Well, now simple math: If the heat output is constant (which it also should be with current processors while benchmarking under full load) and the heat dissapation is also constant but lower, it will still throttle (after a certain amount of time)! The Cortex-A73 just produces less heat while on constant load, that's all. If the phone design is bad or for example your hand covers the part heat should mostly dissapate on your phone, it will still overheat. Sorry but this has to be mentioned, the Cortex-A73 isn't a magic chip design capable of ignoring thermal conditions.
The caption totally made me think its totally fake...But now i think its possible...
can Qualcomm manufacture a Soc with 8 cortex a72 cores?
if yes then y don't they manufacture it?
it will boost the performance by huge margin
Yes they could, as could Samsung or MediaTek, however such a SoC would not be very battery friendly. The idea is to combine these with more power efficient (but lower performance) cores like the Cortex-A53 so that the "BIG" cores are only used when needed.
For example, watching a UA-cam video doesn't need a BIG core like the A73, little cores like the A53 are more than sufficient. So by combining them you get the best of both worlds.
+Gary Sims
thanks for ur reply sir
+Gary Sims
sir bt if watching a youtube video utilises 90% of a53
and 30% of a73
wouldn't a73 be a better option?
jUST a thought
My testing shows that UA-cam uses about 30% of a Cortex-A53. Please see here: www.androidauthority.com/galaxy-s6-octa-core-processor-usage-617585/
+Gary Sims
thnks sir
appreciate your work
DO A SAMSUNG GALAXY C5/C7 REVIEW
Will the note 6 have it cuz rumour has it that note 6 will have 6gb ram.
Since the Exynos 8890 used Mongoose, and the Snapdragon 820 used Kryo, then there is a high chance that the Note 6 (or Note 7, whatever it is called) will use a custom core SoC.
Gary's videos are an auto like
now we need only dual core a73 for budget phones
AA's best creations in the recent time are Gary's geeky videos
what watch is he wearing?
I have a Sony Smartwatch 3 and a FitBit Charge HR.
***** oh, thanks a lot for replying! The SW3 looks rad, btw
What about thé LG G4
Then why custom cores are developing..?
Im going to get one of the Huawei Tablets that use the kirin 950 2.3 GHz (4 x A72)
1.8 GHz (4 x A53). Blows the doors of an Apple Airpad.
sonof hendrix Kirin 960 is better
How about the iPhones? Like the A9. They basically have no thermal throttling.
Probably most pro gamer on PC or mobile know CPUs can run more efficiently and more power can be generated if CPU frequencies be fixed at a level of frequency , for example most cpu working in different workloads there is top and bottom frequency but a cpu can be more powerful at a normal frequency 2.7 ghz cpu is more stable than 5ghz cpu with same architecture I know these are so basic but I mean is most important thing is how to manage the frequencies interactive is bad ondamannd is bad too schedule is good for stability actually in interactive app lunch time is more slower than ondamannd there always must be delays to open an app ( at interactive) .
now i know
a cpu with four A-73 would be good for me...
now this is a good tecnology-solution on a smartphone
not curve-screen/slow-motion-cam/no-edge/heart-rate-sensor/finger-print bullshit
agreed!
Slow motion can be an interesting & useful feature, not for everyone though.
it just fun for a while , want slow motion get a real camera
Sega Hen
I look better using my phone everywhere to everything, even if your point is relevant. But then we can use the same argue for everything, want a real processor, buy a PC... etc
dauxanh 64 Heyy fingerprint its cool!, once u have it u would not want to have phone without it.
The snapdragon 650 already does that. Two a72 and 4 four a53 cores.
Indeed there are already hexa-core processors, but the point is that OEMS should be able to make hexa-core processors using the Cortex-A73 for around the same price as octa-core Cortex-A53 chips. The current hexa-core Cortex-A72/Cortex-53 SoCs are more expensive.
+Gary Sims thanks for the reply Gary. I didn't know that bit of info. It would be very interesting indeed if the cost of a Octa core a53 matches the new hexagon core setup. It would bring a lot of performance in the lower mid range (~200-300 dollar). If they put a gpu in it that matches the snapdragon 650 or is better than it it will be ground breaking. Exciting times indeed.
+Sankalp Gupta *hexa core
I'm sure there will be a catch to that "CPU that won't overheat"
It will throttle like hell so it wont overheat lol
Rotated Quickbits
lol yea that's what i was thinking, it is going to throttle even on idle lol
That depends on the overall heat (GPU + other components) in the phone as Gary explained ;). The main thing about the cortex A73 is that it is suppose to provide the same sustained performance and produce constant heat. If in the SoC everything is designed to limit the amount of overall heat then, the A73 is gonna be awesome.
seems like he wasnt listening to gary when he was talking or didnt watch the video
+1300l
But that is also some kind of limitation. You can't look at this problem only from the hardware perspective. An inefficient algorithm is an inefficient algorithm. There are so much apps out there which based on this "everything and the kitchen sink mentality" and this applications comes inefficient by default.
samsung please dominate on this please for the note 6 international version this is needed.
Sometimes CPU-Z tells me my phone has 94 degrees celsius and that is true.
I really hope you are talking about Fahrenheit
No :D
yes it is. that's the actual core temp.
Snapdragon 810?
That won't be the temperature of the phone. That'll be the SoC temperature and that doesn't seem too insane if your phone has a Snapdragon 810 like mine.
i thought A72 and SD820 will be the peak for couple of years , but ARM proved me wrong, CPU that wont over heat im so suspicious i wouldnt beleive untill i really see it , this video explained why not overheating is good , but i really want to know how is it possiple !
www.theregister.co.uk/2016/06/01/arm_cortex_a73/ ........
thx for increasing my hopes up for nothing , seriously a processor that wont over heat , dnt exist , it can only exist if u do little things with it that it never needs to go 100% perfomance mode , that new A73 is just better optimized for phones than the ones before , so nothing new here , at the end of that article u see that they dnt know what happens in the future , ofcourse new apps with more need for power will arrise , so basically A73 wont heat if they used it this year with less hungry apps , but definitely will overheat next year :v .............................ok A73 is ofcourse better than A72 , and its great , but dnt pull things like it wont over heat :( made me waste one hour of reading -joke-
Hmmm... Sorry but I don't think you understood my video or the article from The Register. The end of that article doesn't say what you claim it does. The statement "so basically A73 wont heat if they used it this year with less hungry apps , but definitely will overheat next year" is basically untrue. The heat output numbers (peak and sustained) of the A73 aren't based on the demands of this year's apps, I think the section you misread from that article is about the branch predictor and how it behaves.
"ARM reckons its A73 can stay in out of peak mode for much longer, drawing 750mW per 2.8GHz 10nm FinFET core and achieving twice as much performance as a 20nm 1.9GHz A57 or a third more performance over a 2.5GHz 16nm A72, before kicking into a peak setting." that is taken directly from that article .. so basically it stays with low sustained heat much longer than a72 but still reach peak which means it over heats .... the part where it explains how that its better and have longer sustained period explained nothing new just better optimization in my opinion using lesser 2 lanes instead of 3 because phones dnt need them much and better ram management and better branching prediction all that doesnt simply say that it wont over heat ..... that part about less hungry apps is my opinion . ........ thx for reply , any way i was just interested to know how aprocessor wont over heat .
Hunter red Well, I know Chris Williams from The Register personally, so I don't want to say anything negative about him, he is a good guy. He is right in that the peak level and sustained level aren't exactly the same, you can see that from the diagram both in his article and in mine. BUT you are reading too much in the phrase "before kicking into a peak setting." I have spoken to the ARM engineers who designed the chip, face to face, and the "stay in out of peak mode much longer" is basically a misrepresentation of how the Cortex-A73 works.
+Gary Sims its my fault trying to put that article against what u said , but simply i cant find any explanation any where to that processor wont overheat part.
How the hell did you get this job? Samsung Exynos is build on 14nm, not 16nm. Apple A9 is build on both 14 and 16nm. Apple SoC also don't overheat or throttle because the heat envelop is designed for the SoC at full speed. Race to idle is also why Apple stick with 2 broad cores instead of multiple high clock narrow cores.
Yes I know the Exynos is made using 14nm. All the data that ARM gave was about 16nm and when I mentioned the Exynos I should have said 14nm not 16nm. I mentioned this in the Errdata comment I posted here: ua-cam.com/video/IBAIaNdbqcQ/v-deo.html&lc=z13jc5qbbqfxdl13n23afherlqf3ejhhx04
2:09 brrrring down
And?
+Gary Sims don't mind it. I was just kidding.
+Gary Sims btw i like your videos.
android authority t shirts ...
ok
It can still overheat
instead of a73... you said a72 twice.. i guess @Gary
Maybe, probably, there were a couple of times where I did that during the recording and I rerecorded the segment or edited the video, there could be some other cases where I got the names mixed, but I haven't spotted them (yet).
+Gary Sims Cool.. anyways.. great video.. :)
Gary, so you're saying that the CPU won't OVERheat because it will start out hot :)
Seriously - a pity only HW vendors think about heat, i.e. an issue you haven't touched on with the Java clip, is the MASSIVE CPU work done on memory allocs (not gc, the alloc part is the killer) that Java libs impose IMPLICITLY in the background. This one affects CPU load and hence heat dramatically. In CPP you can find implicit allocs in STL containers, in C it's always explicit, but LOTS of Java libs do it in the background so you can't escape it.
Why do I pick on allocs? Profile the amount of CPU time spent in allocs when several active apps run - you'll find that they are more major than the actual calcs the apps need. It's Java that's the greatest heat sinner out there, you have to know it extremely well to avoid its loopholes, unlike CPP, and I wish google would have done something about it.
It is a big deal for those who uses smartphone that had overheating problems.
Amazing!!! This will be wonderful for increased sustained performance!