The M1 Ultra features twice the capabilities of the Apple M1 Max with 20 CPU cores, including 16 high-performance units and 4 high-efficiency units. It also features 32 Neural Engine cores capable of up to 22 trillion operations per second. The M1 Ultra also contains two Thunderbolt 4 / USB4 controllers which can support twice as many ports as the M1 Max. The M1 Ultra is available in two versions, with 48 or 64 GPU cores.
DRAM must be ordered in advance in 64 or 128 GB configurations as they are part of the M1 Ultra's SoC package. This also applies to the storage as the 1, 2, 4, or 8 TB SSD are also part of the package.
On March 8, 2022, Apple senior VP of hardware technologies Johny Srouji revealed that the M1 Max included a previously undisclosed interconnect feature called UltraFusion, which allowed two of the dies to be packaged together to create the M1 Ultra, with twice the computing power. The silicon interposer is stated to be able to handle over 10,000 low-latency signals for an interprocessor bandwidth of 2.5 TB per second. The combined total die size is estimated to be 840 mm2.
- Apple Event — March 8 by Apple, YouTube. 2022-03-08.
- Apple unveils M1 Ultra, the world’s most powerful chip for a personal computer, Apple Inc. 2022-03-08.
- Customize your Mac Studio, Apple Inc. Archived 2022-03-08.
- The M1 Ultra: Apple’s big leap forward in chip design by Jonny Evans, Computerworld. 2022-03-09.
- Mac computers with Apple silicon at Apple Support
- Apple M Family at WikiChip
- Apple M1 Ultra at Wikipedia
- Apple Announces M1 Ultra: Combining Two M1 Maxes For Workstation Performance by Ryan Smith at AnandTech (2022-03-08)
- Compared: Apple Silicon M1 vs M1 Pro vs M1 Max vs M1 Ultra by Mike Peterson at AppleInsider (2022-03-09)
- Apple M1 Ultra — everything we know so far by Alex Wawro at Tom's Guide (2022-03-09)