A19 vs. A19 Pro: iPhone 17 Chip Differences - MacRumors
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A19 vs. A19 Pro: iPhone 17 Chip Differences

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Apple introduced A19 and A19 Pro chips for the iPhone 17 lineup, with a total of three chip variants. The ‌iPhone 17‌ uses the regular A19 chip, while the iPhone Air and iPhone 17 Pro models have the A19 Pro. All of the chips are built on a more advanced 3-nanometer process.

a19 pro chip
The ‌iPhone 17 Pro‌ and Pro Max have a higher-end A19 Pro chip with a 6-core GPU, and the ‌iPhone Air‌ has an A19 Pro chip with one less GPU core. Here are all the differences, according to Apple:

  • A19 - 6-core CPU, 5-core GPU
  • A19 Pro (iPhone Air) - 6-core CPU, 5-core GPU
  • A19 Pro (iPhone 17 Pro) - 6-core CPU, 6-core GPU

All of the A19 chips have "Neural Accelerators" for each GPU core that boost daily workflows and the performance of local AI models, such as on-device Siri. There's also an updated 16-core Neural Engine, an updated display engine, and an updated image signal processor.

Apple says that the A19 Pro chip has the fastest CPU in any smartphone and the most advanced GPU yet. The CPU includes 50 percent larger last-level cache size, improved front-end bandwidth and improved branch prediction. The GPU features increased math rates, unified image compression, and second-generation dynamic caching. The Neural Accelerators offer 4x the peak compute of the A18 Pro.

The ‌iPhone 17 Pro‌ models have an updated thermal architecture that uses vapor chamber cooling, further enhancing the performance of the A19 Pro chip. With the new chip and the updated thermal design, the CPU and GPU in the A19 Pro deliver 40 percent better sustained performance than the A18 Pro in the iPhone 16 models.

Apple also included 12GB RAM in the ‌iPhone Air‌ and the ‌iPhone 17 Pro‌ models, while the ‌iPhone 17‌ has 8GB.

Related Roundups: iPhone 17, iPhone 17 Pro, iPhone Air
Buyer's Guide: iPhone 17 (Neutral), iPhone 17 Pro (Don't Buy), iPhone Air (Neutral)
Related Forum: iPhone

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Top Rated Comments

Archerious Avatar
Archerious
12 months ago



Apple also included 12GB RAM in the iPhone Air and the iPhone 17 models, while the iPhone 17 has 8GB.

Article Link: A19 vs. A19 Pro: iPhone 17 Chip Differences ('https://www.macrumors.com/2025/09/09/iphone-17-a19-chip/')
Typo?
Score: 8 Votes (Like | Disagree)
C
Corefile
12 months ago
Which A19 chip is going into the Macbook?
Score: 6 Votes (Like | Disagree)
P
Paddle1
12 months ago

All of the A19 chips have "Neural Accelerators" for each GPU core that boost daily workflows and the performance of local AI models, such as on-device Siri.
It's interesting that the 16 series didn't have something like this despite them saying it was built for Apple Intelligence.
Score: 5 Votes (Like | Disagree)
J
jmonster
12 months ago

At one point during the keynote they pointed out that the A19 has desktop (or did they say MacBook? something like that)-class performance. That felt like foreshadowing.
this was literally their tagline for the original ipad pro
Score: 4 Votes (Like | Disagree)
spaxxedout Avatar
spaxxedout
12 months ago
I think this is a very nice preview of the m5!
Score: 4 Votes (Like | Disagree)
kiranmk2 Avatar
kiranmk2
12 months ago

Yup, i can entirely imagine the 16 series being hardware gated out of AI features in the future.

WHich isn't necessarily unreasonable if these are new features being released in say 2028 and by then a 4 year old chip is too old; but it's going to be a huge problem if the features advertised with the 16 series only get released in 2028 and doesn't work on the phone it got advertised with.
I imagine that for exactly this reason, Apple will be sure to enable all the promised features of Apple Intelligence on the A18 devices. It will simply be that the performance will be much less that on the A19 devices where AI can harness bother the neural engine and the GPU "neural accelerators" rather than just the neural engine.
Score: 4 Votes (Like | Disagree)
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