2023 Mac Pro M2 Ultra: Per CPU Performance Variation

2023-07-17 • SEND FEEDBACK •
Related: 2019 iMac 5K, 2019 Mac Pro, 2020 iMac 5K, 4K and 5K display, Apple 2023 Mac Pro M2 Ultra, Apple Silicon, CPU cores, iMac, iMac 5K, laptop, Mac Pro, MacBook, MacBook Pro, Macs, Other World Computing

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MPG tested the Apple Mac Pro with M2 Ultra #Z171000US 192GB/4TB/60GPU. 76 GPU/8TB SSD are options.

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2023 Mac Pro M2 Ultra

The M2 Ultra chip has 16 performance cores and 8 efficiency cores.

Once 17 or more CPU cores are used, a drop in per CPU performance can be expected, since the efficiency cores are slower than the performance cores.

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Per-CPU performance — SHA512 hashing

SHA512 hashing speed with 1 or 2 CPU cores is notably faster than 3..16 CPU cores.

The per-CPU slowdown with 3+ cores is presumably not related to memory bandwidth, because from 3...16 CPU cores the speed is invariant.

Is there higher-speed upclocking when only 1 or 2 CPU cores are in use?

2023 Mac Pro: per CPU performance, 1..24 CPU cores

2023 Mac Pro M2 Ultra