The M1 has four high-performance "Firestorm" and four energy-efficient "Icestorm" cores, first seen on the A14 Bionic. It has a hybrid configuration similar to ARM big.LITTLE and Intel's Lakefield processors. This combination allows power-use optimizations not possible with previous Apple–Intel architecture devices. Apple claims the energy-efficient cores use one-tenth the power of the high-performance ones. The high-performance cores have an unusually large 192 KB of L1 instruction cache and 128 KB of L1 data cache and share a 12 MB L2 cache; the energy-efficient cores have a 128 KB L1 instruction cache, 64 KB L1 data cache, and a shared 4 MB L2 cache. The SoC also has an 8 MB System Level Cache shared by the GPU.
The M1 Pro and M1 Max use the same ARM big.LITTLE design as the M1, with eight high-performance "Firestorm" (six in the lower-binned variants of the M1 Pro) and two energy-efficient "Icestorm" cores, providing a total of ten cores (eight in the lower-binned variants of the M1 Pro). The high-performance cores are clocked at 3228 MHz, and the high-efficiency cores are clocked at 2064 MHz. The eight high-performance cores are split into two clusters. Each high-performance cluster shares 12 MB of L2 cache. The two high-efficiency cores share 4 MB of L2 cache. The M1 Pro and M1 Max have 24 MB and 48 MB respectively of system level cache (SLC).
The M1 Ultra consists of two M1 Max units connected with UltraFusion Interconnect with a total of 20 CPU cores and 96 MB system level cache (SLC).
The M1 integrates an Apple designed eight-core (seven in some base models) graphics processing unit (GPU). Each GPU core is split into 16 execution units (EUs), which each contain 8 arithmetic logic units (ALUs). In total, the M1 GPU contains up to 128 EUs and 1024 ALUs, which Apple says can execute up to 24,576 threads simultaneously and which have a maximum floating point (FP32) performance of 2.6 TFLOPs.

The M1 Pro integrates a 16-core (14 in some base models) graphics processing unit (GPU), while the M1 Max integrates a 32-core (24 in some base models) GPU. In total, the M1 Max GPU contains up to 512 execution units or 4096 ALUs, which have a maximum floating point (FP32) performance of 10.4 TFLOPs.

The M1 Ultra features a 48- or 64-core GPU with up to 8192 ALUs and 21 TFLOPs of FP32 performance.
The M1 uses a 128-bit LPDDR4X SDRAM in a unified memory configuration shared by all the components of the processor, aka memory on package (MOP). The SoC and DRAM chips are mounted together in a system-in-a-package design. 8 GB and 16 GB configurations are available.

The M1 Pro has 256-bit LPDDR5 SDRAM, and the M1 Max has 512-bit LPDDR5 SDRAM memory. While the M1 SoC has 70 GB/s memory bandwidth, the M1 Pro has 200 GB/s bandwidth and the M1 Max has 400 GB/s bandwidth. The M1 Pro comes in memory configurations of 16 GB and 32 GB, and the M1 Max comes in configurations of 32 GB and 64 GB.

The M1 Ultra doubles the specs of the M1 Max for a 1024-bit or 1-kilobit memory bus with 800 GB/s bandwidth in a 64 GB or 128 GB configuration.
The M1 is the successor to and integrates all functionality of the Apple T2 chi…

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