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M1-based Apple Silicon, possibly 12-core M1X, set to power upcoming colorful 24-inch and 31.5-inch iMac devices

A redesigned 2021 iMac could feature 12-core M1-based Apple Silicon, popularly known as the "M1X". (Image source: Apple/MattTalksTech - edited)
A redesigned 2021 iMac could feature 12-core M1-based Apple Silicon, popularly known as the "M1X". (Image source: Apple/MattTalksTech - edited)
A leaker has offered up some clues in regard to upcoming redesigned Apple iMacs. According to the details, the iMac computers will feature considerable changes on the outside and on the inside. This includes being powered by M1-based Apple Silicon, which could end up being the oft-rumored 12-core M1X chip.

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There have been some developments in regard to the Apple iMac lately: Some SKUs were discontinued and new devices were spotted in macOS code. So unsurprisingly there are plenty of rumors flying around about what Apple may have in store for a redesigned iMac, and according to LeaksApplePro the redesign plans involve a 12-core M1-based processor. An Apple Silicon iMac is expected to be revealed this year, but it could be unveiled much sooner than expected, and in up to a considerable 31.5-inch form.

The leaker starts the rumor tweet with production details, with the redesigned iMac apparently almost ready for the world: “ready in 1 or 2 months”. The already revealed model numbers are then linked to screen sizes, with the J456 model being the 24-inch variant and the J457 model supposedly being the 31.5-inch iMac. There’s also mention of a “redesigned cooling system”, which will allow an M1 or M1X iMac to utilize its potent Apple Silicon to its fullest potential, and there is also a note about narrower bezels. Even the alleged 2021 iMac color choices are detailed: silver, space gray, green, sky blue, and rose gold.

But for most, the important information concerns the M1 processor, or in this case, the M1-based chip. The Apple M1 currently found in devices like the 2020 Mac mini is an 8-core SoC; however, according to the tech tipster the redesigned iMac is going to pack a 12-core part that also has 16 GPU cores (the M1 has eight GPU cores although the 2020 MacBook Air base model has a 7-core variant). The specs match with what is rumored for the potential M1X, with eight out of the 12 CPU cores being high-performance Firestorm units operating at up to 3.2 GHz. So this “M1-based processor” for the 2021 iMacs will obviously offer the same maximum clock as the regular M1 Apple Silicon but with more CPU and GPU cores for greater workload performance.

Buy the Apple M1 Mac mini on Amazon

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Daniel R Deakin
Daniel R Deakin - Managing Editor News - 2413 articles published on Notebookcheck since 2012
My interest in technology began after I was presented with an Atari 800XL home computer in the mid-1980s. I especially enjoy writing about technological advances, compelling rumors, and intriguing tech-related leaks. I have a degree in International Relations and Strategic Studies and count my family, reading, writing, and travel as the main passions of my life. I have been with Notebookcheck since 2012.
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> Notebook / Laptop Reviews and News > News > News Archive > Newsarchive 2021 04 > M1-based Apple Silicon, possibly 12-core M1X, set to power upcoming colorful 24-inch and 31.5-inch iMac devices
Daniel R Deakin, 2021-04- 2 (Update: 2021-04- 2)