Skip to main content

However good Big Navi is AMD GPUs are being cut from future Apple Macs too

Apple Silicon GPU
(Image credit: Apple)
Audio player loading…

It's not just Intel that has been dumped from Apple's next generation of Mac (opens in new tab) computers, AMD has also seen its GPUs nixed from future machines too. The new Apple Silicon Macs will contain pure Apple-designed CPUs and GPUs, with Radeon graphics chips being lumped in with the old Intel-based Macs set for the scrap heap.

In a recent WWDC session, Bring your Metal app to Apple Silicon Macs (opens in new tab) (via Sweclockers (opens in new tab)), director of GPU software, Gokhan Avkarogullari, introduces developers to the basic tools and compute APIs they can use to shift their applications across from the current x86 ecosystem over to the new Apple world order. 

Apple isn't just talking about getting Photoshop and Premiere Pro playing nice with its new ARM-based processors, it's also referencing games designed for machines with Intel silicon inside too. "The Apple Silicon Mac," says Avkarogullari, "contains an Apple-designed GPU that is designed to handle the workloads from desktop games and pro apps, all while delivering new levels of speed and power efficiency."

At the beginning of the session Avkarogullari demonstrates the x86 version of Dirt Rally recorded directly from an Apple Silicon Mac "running the unmodified x86 compiled binary translated using Rosetta." And it seems to be running beautifully, with all the geometry, shading, and particle effects you should expect.

Using the tile-based deferred rendering (TBDR) technique Apple is matching the way its mobile GPUs operate, dividing the image into tiles that can be rendered in parallel to balance power and energy efficiency. It will also, according to Apple, mean far lighter GPU and memory loads when operating with multi-sample anti-aliasing (MSAA) too.

Out of the box, native x86 apps will still work on Apple Silicon Macs, but they will inevitably incur some performance penalty because of the translation and consistency features for Metal, the Apple graphics API. It is therefore encouraging developers to recompile using a new macOS SDK and then specifically optimise the code for the new Apple-designed GPU. 

The two-year plan for transitioning entirely to its own silicon is very much underway now, and the first fruits of this approach are expected to arrive later this year in the new Apple Silicon Macs.

Your next machine

(Image credit: Future)

Best gaming PC (opens in new tab): the top pre-built machines from the pros
Best gaming laptop (opens in new tab): perfect notebooks for mobile gaming

Apple ditching AMD GPUs is not necessarily as big a loss for Dr. Su's team as the polo necks cutting Intel processors out of the Mac picture, but it will still be disappointing for the Radeon faithful to see a key recent customer moving away from its improving graphics architectures. 

It will mean a complete departure from Macs essentially just being PCs with different software, as there will be almost nothing shared between the seemingly endless Mac vs PC debate. But, however good Dirt Rally might look in a neat online demo, I think you're probably still going to be better off with Cyberpunk 2077 running on your good ol' x86 gaming PC, whether it's Intel, Nvidia, or AMD silicon humming away inside it.

Dave James
Dave James

Dave has been gaming since the days of Zaxxon and Lady Bug on the Colecovision, and code books for the Commodore Vic 20 (Death Race 2000!). He built his first gaming PC at the tender age of 16, and finally finished bug-fixing the Cyrix-based system around a year later. When he dropped it out of the window. He first started writing for Official PlayStation Magazine and Xbox World many decades ago, then moved onto PC Format full-time, then PC Gamer, TechRadar, and T3 among others. Now he's back, writing about the nightmarish graphics card market, CPUs with more cores than sense, gaming laptops hotter than the sun, and SSDs more capacious than a Cybertruck.