Apple Watch's S8 Chip Features Same CPU as S6 and S7
The S8 chip in the Apple Watch Series 8, Apple Watch Ultra, and second-generation Apple Watch SE features the same CPU as the S6 and S7 chips, according to identifier codes.
The CPU within Apple's S8 SiP carries the same T8301 identifier as the CPU in the S6 and S7 chips that debuted in the Apple Watch Series 6 and Apple Watch Series 7. This explains why Apple has only compared its S-series chips in recent years to the S5 chip or earlier.
It also means that the Apple Watch Series 6, Apple Watch Series 7, Apple Watch Series 8, Apple Watch Ultra, and second-generation Apple Watch SE all feature the exact same CPU. It is worth noting that Apple may have still iterated on other parts of the SiP to accommodate new components such as the Apple Watch Series 8's new accelerometer and gyroscope.
The S6, S7, and S8 chips all feature 32GB of storage and dual-core CPUs. When Apple debuted the S6 in the Apple Watch Series 6, the last time it made performance claims about its latest smartwatch lineup, it said that the chip allowed apps to launch 20 percent faster.
The S6, S7, and S8 are based on Apple's A13 Bionic chip from the iPhone 11 lineup and are manufactured using TSMC's 7nm process. Apple transitioned to TSMC's 5nm process starting with the A14 Bionic chip, and the iPhone 14 Pro's A16 Bionic is the first Apple chip to be fabricated with a 4nm process.
One explanation for Apple not advancing the CPU technology in its S-series chips is potential that advancements from using the cores in the A14 chip and TSMC's 5nm or 4nm processes would primarily yield performance improvements, which are no longer essential for the Apple Watch. Waiting for TSMC's 3nm process, which is set to enter mass production toward the end of this year, could yield more meaningful efficiency improvements – an area of much greater importance when it comes to the Apple Watch because it could help prolong battery life.
Popular Stories
Apple today seeded the release candidate version of iOS 18.5 to developers and public beta testers, giving us a look at the final version of the update that will be provided to the public next week.
With the release candidate, Apple provided release notes, so we have a more complete look at the new features that are included in the update, including those that weren't found during the beta...
If you owned a Siri-compatible device and had an accidental Siri activation between September 17, 2014 and December 31, 2024, you could be eligible for a payment from Apple as part of a class action lawsuit settlement.
Apple in January agreed to pay $95 million to settle a class action lawsuit involving Siri spying accusations, and a website to distribute the funds has now been set up and...
In its press release for the new Pride Band today, Apple said that iOS 18.5 is "upcoming," following more than a month of beta testing.
We expect the iOS 18.5 Release Candidate to be released this week, and this should be the final beta version, barring any last-minute bugs or changes. The software update should then be released to the general public next week.
iOS 18.5 is a relatively...
We've still got months to go before the new iPhone 17 models come out, but a combination of dummy models and leaks have given us some insight into what we can expect in terms of camera changes.
Apple is adding new camera features, and changing the design of the camera bump for some models. You might be skeptical of dummy models, but over the years, they've proven to be a highly accurate...
Apple plans to release its first foldable iPhone next year, according to several reporters and analysts who cover the company.
In his Power On newsletter today, Bloomberg's Mark Gurman said the foldable iPhone will offer two key advantages over other foldable smartphones.
First, he said the foldable iPhone will have a "nearly invisible" crease when unfolded. This means the device's...
Despite being more than two years old, Apple's AirPods Pro 2 still dominate the premium wireless‑earbud space, thanks to a potent mix of top‑tier audio, class‑leading noise cancellation, and Apple's habit of delivering major new features through software updates. With AirPods Pro 3 widely expected to arrive in 2025, prospective buyers now face a familiar dilemma: snap up the proven...
While the iPhone 18 Pro models are still around a year and a half away from launching, there are already several early rumors about the devices.
Below, we recap some key iPhone 18 Pro rumors, as of May 2025.
Under-Screen Face ID
In April 2023, display industry analyst Ross Young shared a roadmap showing that iPhone 17 Pro models would feature under-display Face ID. In May 2024,...
