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A12X Bionic









Gerard Williams III, who led the design of every Apple chip core from the A7 to the A12X, departed the company last month
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Gerard Williams III, who led the design of every Apple chip core from the A7 to the A12X, departed the company last month
Gerard Williams III, who led the design of every Apple chip core from the A7 to the A12X, departed the company last month
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If you think Geekbench is accurate for cross cpu architecture comparison, remember EPYC 7501 (32 core server processor) is scored lower than Apple A12X in multicore section.
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If you think Geekbench is accurate for cross cpu architecture comparison, remember EPYC 7501 (32 core server processor) is scored lower than Apple A12X in multicore section.

epyc 7501 (17267) https://browser.geekbench.com/processors/2141

A12x (17940) https://browser.geekbench.com/ios_devices/58

And 6700k and ryzen 1600 are scored lower than an a12x too, if you think numa is the case.


How does the A12x compare to other non-Apple processors?
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How does the A12x compare to other non-Apple processors?

Hello! I currently work in a retail store that sells both Apple and Microsoft computers and tablets. I’m not very well versed in all things Apple despite having various Apple devices myself.

I’ve been looking at the current iPad Pro models and trying to get a grasp on how they compare to other tablets, and even laptops. My understanding is that they’re more powerful than the iPad/iPad Air. Are the iPad Pros comparable to the most recent MacBook models, with the Intel processors? What Intel processor is most comparable to the A12x?

I hope this isn’t a dumb question, and please let me know if this isn’t the right community for this type of question!! I’d simply like to know more so that I’m able to sell the products better.



Apple's A12 die shot analysed and how a potential Apple A12X SoC could look like.
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Apple's A12 die shot analysed and how a potential Apple A12X SoC could look like.

Tech Insights released a die shot with floor plan today (mirror). That means it's time for me to estimated how a more powerfull A12X could look like!

First some stats measures from the floor plan. We know that the A12 die size is 9.89mm x 8.42mm = 83.27 mm2 and contains 6.9 billion transistors.

Part (A12) Area MTransistors Percentage
Big CPU (2x Vortex) 3,83 mm2 317 4,6%
Little CPU (4x Tempest 6,07 mm2 503 7,3%
L2 cache (8 MB) 3,34 mm2 277 4,0%
DDR Logic (64-bit) 2,56 mm2 212 3,1%
GPU (4 clusters) 12,90 mm2 1069 15,5%
NPU (8 clusters) 5,53 mm2 458 6,6%
Total of above parts 34,23mm2 2836 41,1%

You can see the area's on this floor plan.

All the above are measured values. If you don't like speculation and calculated guess, don't read further.

The Big CPU cluster seems a little small compared to the Litte CPU cluster, a big core should be at least twice the size of a little core. But let's assume that they are right.

So let's build a A12X. I made the following modifications for my theoretical A12X.

  • Doubled Big CPU cores (2 to 4 Vortex cores)

  • Doubled the L2 cache (8 to 16 MB)

  • Doubled the GPU (4 to 8 clusters)

  • Made the NPU 50% larger (8 to 12 clusters)

  • Doubled the DDR Logic interface (64-bit to 128-bit)

That would give the following values:

Part (A12X) Area MTransistors
Big CPU (4x Vortex) 7,66 mm2 635
Little CPU (4x Tempest 6,07 mm2 503
L2 cache (16 MB) 6,58 mm2 554
DDR Logic (128-bit) 5,12 mm2 424
GPU (8 clusters) 25,80 mm2 2138
NPU (12 clusters) 8,30 mm2 687
Total of above parts 59,63mm2 4941

So far I added about 2,1 billion transistors and about 25,4mm2. We also have to take interconnect into account, even Apple can't magically teleport data to different parts of the chip, so let's add 20% extra for interconnect logic (this is a guess). Also I want a larger video decoder and display pipeline for the high-res 120Hz iPad screens, so let's add 4mm2 for that (plus 20% interconnect).

Now our A12X measures 83,27mm2 + (25,4 mm2 + 4 mm2) * 1,2 = 118,5mm2, containing 9,8 billion transistors. It's 42% bigger than our A12. Sounds about right, and I think we can expect something like this from Apple in the near future.

Edit: As always, AnandTech did a much better job than both Tech Insights and me. Read their analysis here: TechInsights Publishes Apple A12 Die Shot: Our Take




[Doubt] Intel Core i7 8550U loses to Apple A12X on iPad pro in Geekbench. Are the scores directly comparable to each other?
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[Doubt] Intel Core i7 8550U loses to Apple A12X on iPad pro in Geekbench. Are the scores directly comparable to each other?

ARM processors like the A12X Bionic are nearing performance parity with high-end desktop processors, but the old truth of x86 superiority still lives strong.






A12X Geekbench estimates with Apple’s claimed improvement over A10X
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A12X Geekbench estimates with Apple’s claimed improvement over A10X

Apple claims 35% faster single thread and 90% faster multi thread with 2x faster graphics. So lets take those percentage differences from the A10X geekbench scores and get the performance shall we :)

  • Single Core = 5250

  • Multi Core = 17650

  • Graphics = 58000

The new iPad Pro is fast


No one is discussing the A12X bionic?
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No one is discussing the A12X bionic?

This is a really large upgrade over the A10X when you take into account multicore performance. This also paves the way for machine learning algorithms to be used by companies like adobe when editing your images/artwork and apple release their dev tools for taking advantage of that neural engine. The increase in size of the neural engine between the A11 and A12 really points at the fact that apple wants this to be used by individuals other than apple (I mean they basically just use it for face unlock and the A11 was good enough for that).

Finally going quad core and bringing running machine learning natively to the ipad is going to be a big deal come iOS13/14 imo and I think people are missing that.


[Update: A12X processor] Exclusive: iPad Pro Face ID details, 4K HDR video over USB-C, AirPods-like Apple Pencil 2 pairing, more...
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