A9X Die Photo From iPad Pro Reveals 12-Cluster Graphics, No L3 Cache

Financial news website The Motley Fool has shared details of the A9X die featured in the new Apple iPad Pro, thanks to analysis from electronics teardown firm Chipworks. The photo reveals the A9X's dual-core CPU and a 12-cluster GPU to drive the device's massive display.

While the CPU core count observed in the A9X matches that of the A9 from the iPhone 6s and 6s Plus, the 12-cluster GPU is twice as powerful as the six-cluster GPU found in the A9 design. Otherwise, the core and cluster designs appear to be identical to those found in the A9 die shots.

a9x_die_shot

Dual-core CPU boxed in green, six dual-cluster GPU regions boxed in blue

Chipworks confirms that the die shown in the photo is fabricated by TSMC, and it does indeed show similarities with the existing A9 TSMC die already pictured by Chipworks.

The Motley Fool also points out that the 8 MB third level cache featured on the A9 to help manage data flow to and from memory is not present on the A9X die, suggesting that the absence of this cache is due to the increased memory bandwidth that the A9X enjoys by having a memory interface twice the width of the A9 die. Indeed, in the included die shot, an expansive DRAM memory interface can be observed across three sides of the die.

It is also worth mentioning that while the display resolution is much greater than on other iPads, the iPad Pro does not feature the 12-megapixel camera of the iPhone 6s and 6s Plus that would place additional demands on the memory hierarchy for real-time image processing.

The presence of only two CPU cores is also interesting, given that the A8X featured in the iPad Air 2 had three CPU cores. The iPad Pro can make up any resultant performance deficiencies through a combination of higher efficiency, thanks to the new architecture, as well as the large clock speed boost compared to the A8 designs.

Even with the absence of L3 cache and only two CPU cores, the A9X measures 147 square millimeters. This is just 18 square millimeters shy of Apple's largest chip design ever, the A5X featured in the first iPad with retina display. Unsurprisingly, the A5X was quickly phased out and replaced by the smaller A6X seen in the fourth-generation iPad. The A9X's 147 mm^2 die is also larger than the latest quad-core Skylake design from Intel, which comes in at 122 mm^2 on its 14nm FinFET process.

While it may simply be a perfect mixture of die space saving and adequate memory bandwidth for the A9X design, the lack of the third level SRAM cache may tip future design decisions should memory bandwidth improve substantially. 3D IC packaging designs are rapidly approaching mainstream consumer electronics, and they boast a variety of memory configurations, which stand to significantly improve memory bandwidth while also providing lower power dissipation. As we covered recently, packaging technologies enabling these high bandwidth memories may arrive as soon as Apple's A10 SoC for devices next year.

Related Roundup: iPad Pro
Tags: A9X, Chipworks
Buyer's Guide: iPad Pro (Caution)

Popular Stories

iPhone 17 Pro 34ths Perspective

iPhone 17 Pro Launching Later This Year With These 10 New Features

Sunday March 23, 2025 10:00 am PDT by
While the iPhone 17 Pro and iPhone 17 Pro Max are not expected to launch until September, there are already plenty of rumors about the devices. Below, we recap key changes rumored for the iPhone 17 Pro models as of March 2025: Aluminum frame: iPhone 17 Pro models are rumored to have an aluminum frame, whereas the iPhone 15 Pro and iPhone 16 Pro models have a titanium frame, and the iPhone ...
iOS 18

iOS 18.4 Expected Next Week - Here Are the Release Notes

Friday March 28, 2025 2:01 pm PDT by
With the second release candidate of iOS 18.4 that Apple seeded out today, the company finally provided us with release notes that give a full rundown on what to expect. There's an Apple Vision Pro app, new Apple Intelligence features for notifications and additional language support, plus an Apple News Food feature for Apple News+ subscribers, and several updates that should improve the...
Magic Mouse Green

What to Expect From the Magic Mouse 3

Saturday March 29, 2025 10:15 am PDT by
Apple is reportedly working on a new Magic Mouse. Below, we recap what to expect. The two key rumors for the Magic Mouse 3 so far include a relocated charging port, along with a more ergonomic design. It was briefly rumored that the Magic Mouse 3 would also feature voice control, but that was misinterpreted information. Relocated Charging Port While the Magic Mouse switched from...
top stories 2025 03 29

Top Stories: WWDC 2025 Announced, iPhone 17 Pro and iOS 19 Rumors, and More

Saturday March 29, 2025 6:00 am PDT by
Apple's big developer event is a little over two months away, and rumors about what we can expect to see in Apple's next major operating system updates are becoming increasingly frequent. A public release of iOS 18.4 is also imminent with a number of updates and improvements, although we won't be getting the major Apple Intelligence Siri upgrades that had reportedly been planned for this...
Foldable iPhone 2023 Feature Homescreen

Six Things to Know About Apple's Upcoming Foldable iPhone

Friday March 28, 2025 3:54 pm PDT by
We've been hearing rumors about a foldable iPhone for almost a decade now, but it looks like we might finally see the device come to fruition in 2026. We're going to be waiting many more months for the foldable iPhone, but so far we're hearing good things. Apple wants to make it creaseless. It's taken Apple multiple years to design a foldable iPhone that it's satisfied with because Apple ...
iOS 19 visionOS UI Elements

Apple Codename Provides Clue About iOS 19's Rumored New Design

Sunday March 30, 2025 6:40 am PDT by
Multiple sources have claimed that iOS 19 will introduce a new design with more translucent buttons, menus, notification banners, and more, and there is now another clue that points towards this glass-like appearance. Bloomberg's Mark Gurman today said the new design project is codenamed "Solarium" internally. A solarium is a room with glass walls that allow in plenty of sunlight, so this...
Facebook Feature

Facebook's New iPhone App Feature Turns the Clock Back to 2007

Thursday March 27, 2025 1:59 pm PDT by
In the mid-to-late 2000s, Facebook was all about staying connected with friends and family. However, as the social media platform added new features and grew over time, that core experience began to get drowned out. That changes starting now, according to Meta, which today introduced a new feature that will "bring back the joy" of classic Facebook. Specifically, Meta has redesigned the...
Foldable iPhone 2023 Feature Homescreen

iPhone Foldable Display Said to Feature iPad-Style 4:3 Aspect Ratio

Friday March 28, 2025 3:44 am PDT by
Apple's upcoming "iPhone Fold" will feature a foldable screen with a 4:3 aspect ratio, according to a Chinese leaker who previously leaked the book-style device's display dimensions. The Weibo-based account Digital Chat Station claims that Apple will adopt a "roughly" 4:3 aspect ratio on the inner display in order to achieve consistency between the outer display, as well as to ensure parity...

Top Rated Comments

9052042 Avatar
122 months ago
very impressive, the a9 is now 50% thinner in terms of cores, down from 3 to 2. hopefully it'll be 2x as thin next year with the ipad pro 2 :)
The educational system at its BEST! o_O
Score: 12 Votes (Like | Disagree)
Glideslope Avatar
122 months ago
Geek stuff.
True, however still nice to see on MR from time to time. It's an interesting design leaving out the L3. Definitely a Graphics Dedicated design. Apple's Team in Orlando have been quite busy. :apple:
Score: 7 Votes (Like | Disagree)
Lahmy88 Avatar
122 months ago
Can iOS 10 please give us multi user/guest user ability amongst other many needed features eg. iTunes syncing/administration and iCloud user account improvements/merging abilties etc. because as cool as continued hardware improvements are, the software and user experience is most important
Score: 4 Votes (Like | Disagree)
SmoMo Avatar
122 months ago
Can iOS 10 please give us multi user/guest user ability amongst other many needed features eg. iTunes syncing/administration and iCloud user account improvements/merging abilties etc. because as cool as continued hardware improvements are, the software and user experience is most important
iOSX ?
Score: 4 Votes (Like | Disagree)
blackcrayon Avatar
122 months ago
It's only apple that cares about the thinness
That's why the other PC makers started making thin laptops after Apple came out with the MBA?
everyone else wants better battery life
That's why the MacBook Air has usually had some of the longer battery life in its class (accounting for CPU/GPU)?
and quality of software.
That's why your typical PC comes pre-installed with garbage-ware on top of Windows?
I wouldn't buy an MBA even if they stuck in a retina screen.
Sounds like your buying decisions are based on dubious information...
Score: 3 Votes (Like | Disagree)
cdm283813 Avatar
122 months ago
Still does not explain the frame drops when using this tablet at the Apple store. Instant turn off for me.
Score: 3 Votes (Like | Disagree)