Apple says battery life gap only 2-3 percent in TSMC, Samsung A9 chips
Trying to quell rumors, Apple on Thursday issued a statement claiming there is little difference in the battery life of iPhones using A9 chips made by TSMC versus those made by Samsung.
Various anecdotes and Geekbench tests posted online suggested that the gap could be as much as two hours, but an Apple spokesperson told TechCrunch that the variance is small.
"Our testing and customer data show the actual battery life of the iPhone 6s and iPhone 6s Plus, even taking into account variable component differences, vary within just 2-3% of each other," the person said.
The representative blasted "certain manufactured lab tests" as "unrealistic," since they force processors to run at high CPU usage until a battery is drained.
"It's a misleading way to measure real-world battery life," Apple suggested.
Accounts have generally pointed to TSMC-based iPhones lasting longer. The supplier uses a 16-nanometer FinFET process to build its version of the A9, whereas Samsung is believed to use 14-nanometer technology. Energy efficiency normally increases as an inverse function of semiconductor fabrication size.
Apple's dependence on two different A9 manufacturers is likely a result of needing enough chips to meet demand. The strategy may also be a way of forcing price competition, and having a fallback in case of production problems.
Various anecdotes and Geekbench tests posted online suggested that the gap could be as much as two hours, but an Apple spokesperson told TechCrunch that the variance is small.
"Our testing and customer data show the actual battery life of the iPhone 6s and iPhone 6s Plus, even taking into account variable component differences, vary within just 2-3% of each other," the person said.
The representative blasted "certain manufactured lab tests" as "unrealistic," since they force processors to run at high CPU usage until a battery is drained.
"It's a misleading way to measure real-world battery life," Apple suggested.
Accounts have generally pointed to TSMC-based iPhones lasting longer. The supplier uses a 16-nanometer FinFET process to build its version of the A9, whereas Samsung is believed to use 14-nanometer technology. Energy efficiency normally increases as an inverse function of semiconductor fabrication size.
Apple's dependence on two different A9 manufacturers is likely a result of needing enough chips to meet demand. The strategy may also be a way of forcing price competition, and having a fallback in case of production problems.
Comments
Nanometergate.
Meaning, really, REALLY, tiny gate.
Energy efficiency normally increases as an inverse function of semiconductor fabrication size.
I was under the impression that the opposite was true. So smaller die size results in worse energy efficiency?
I was under the impression that the opposite was true. So smaller die size results in worse energy efficiency?
The article and you are right (your impression, that smaller consumes less energy). As the die goes down in size, the energy efficiency goes up; thus, an inverse relationship.
I hope TSMC can produce enough A10s for the iPhone 7.
I was under the impression that the opposite was true. So smaller die size results in worse energy efficiency?
Were they both to INCREASE together then 'the opposite would be true'. efficiency INCREASE: size DECREASE: INVERSE.
And they don't and it isn't.
I was under the impression that the opposite was true. So smaller die size results in worse energy efficiency?
NO, smaller die size does not result in worse efficiency. Die size is not the only parameter -- process, or how they make the chips, also matters. Die size on the same process should result in more efficient chips, but dies size across 2 different processes does not mean much.
Not normally. It just means Samsung's 14nm process isn't as good as TSMC's 16nm process.
I believe you would need to x-ray the device.
Anyone know how to determine the source of a chip in a device?
There were some untrusted apps that purported to be able to tell the difference.
Anyone know how to determine the source of a chip in a device?
MacRumors posted link to an (unverified) app that will tell you. Another may have popped up but I have not kept up with it. I am not that curious at this point.
This isnt a question that is straight forward to answer. What happened a few nodes ago was that leakage increased significantly so chip makers had to make significant changes to processes. Effectively the new process are not ditectly compatable to the old processes.
Now we have this new technology in the teen processes that is dramatically different yet again. FinFET is just one difference that again makes direct comparison between nides impossible. In fact there is good reason to believe s direct shrink was possible. At least not without a power payoff swamped by leakage.
Score one for TSMC.
Good news actually.
It wasn't heat dissipation. It was the fact that no one is using 100% cpu all day.
So of course it will exaggerate the variance.
But still interesting insight into the superiority of TSMC design.
An interesting read:
http://www.fool.com/investing/general/2015/05/18/heres-how-samsungs-14-nanometer-transistors-compar.aspx
Anyone know how to determine the source of a chip in a device?
You can find out with this app:
https://itunes.apple.com/us/app/lirum-device-info-lite-system/id591660734?mt=8&ign-mpt=uo=4
After you install the app:
1) Look under model in the main page
2) If model is N66AP or N71AP, sorry, you’ve got a Samsung chip. If model is N66MAP or N71MAP you’ve got TSMC.
EDIT: looks like the app has disappeared off the app store. Here is link to other way to find out. Use at your own risk:
http://demo.hiraku.tw/CPUIdentifier/