Apple's A15 processor in the iPhone 13 has 15 billion transistors.
Screenshot by Stephen Shankland/CNETApple on Tuesday revealed its iPhone 13's processor, the A15 Bionic, a chip with 15 billion transistors and new graphics and AI abilities.
Transistors are the core circuitry elements that process and store data on chips, and the count is significantly higher than the 11.8 billion on the A14 chip that powers 2020 iPhone 12 models. Miniaturization lets chip designers pack in more transistors for new abilities.
Like its predecessors, the A15 has two high-performance processing cores for the most important work and four high-efficiency cores for background tasks that can run without sapping as much battery power. But Apple says they're faster and supported by a new 5-core graphics processing unit, higher-performance neural engine for AI and machine learning tasks, and a new image signal processor for chores like reducing photo noise. The company unveiled the chip at its iPhone 13 launch event Tuesday.
The chip's top job is to maintain the company's top place for smartphone speed, ensure iPhones remain the first device developers reach for when creating new apps, and keep customers happy with snappy performance and a long useful lifespan for the phone.
The A15 is an important foundation for Apple, not just for the new iPhone. The A15 also will likely power next-generation iPads. And a more powerful variation could be the brains inside new Macs, a follow-up to the way Apple's M1 processor is based on 2020's A14 processor. Apple is amid a two-year process of evicting Intel processors from its Macs.
Designing its own chips gives Apple several advantages. It can set its own priorities in features and release timing. It can better integrate its own software. And more broadly, it can set its own destiny better, a benefit embodied in the "Cook doctrine," named for CEO Tim Cook, to "own and control" the main technologies in its products.
The A15 is built on a 5-nanometer manufacturing process -- the same as the A14.
Apple relies on Taiwan Semiconductor Manufacturing Co. (TSMC) to build the chips it designs. Apple is usually an early adopter of TSMC's latest manufacturing technology, taking advantage of the gradually shrinking circuitry and improving performance to add new abilities each year. It typically costs more to tap into leading-edge manufacturing capacity, but iPhones are premium products.
Intel has suffered in recent years from delays to new manufacturing processes. The resulting lackluster performance and battery life improvements have made Apple's M1 bet look particularly smart. Intel is trying to get back on track with new manufacturing improvements coming with its Alder Lake PC chips this year and the Meteor Lake successor. But even if Intel's plans bear fruit, it won't be until 2024 that the company catches up to TSMC and 2025 until it reclaims its lead.
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