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2022 Mac Studio M1 Ultra: Memory Bandwidth
Related: 2019 iMac 5K, 2019 Mac Pro, 2020 iMac 5K, 4K and 5K display, Apple Mac Studio, Apple Silicon, bandwidth, computer display, CPU cores, iMac, iMac 5K, Mac Pro, Macs, memory, memory bandwidth, Other World Computing
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MPG tested the $7999 Apple Mac Studio M1 Ultra 20-core CPU / 64-core GPU/ 128GB / 8TB SSD , provided on loan for review by B&H Photo, an authorized Apple Mac dealer. Please buy your gear at B&H Photo and OWC/MacSales.com using any link from this site.
This test uses the mt stress command of diglloydTools MemoryTester to evaluate memory bandwidth with a real application using all CPU cores. Not to be confused with memory or CPU specifications—this is the real deal, whatever bandwidth an application actually has available to it combined with what any operating system overhead entails.
Memory bandwidth is especially important for more CPU cores or very fast CPU cores; it is important that it be proportional to the CPU computing power. Hence the 2019 Mac Pro with its 28 CPU cores needs high memory bandwidth (many cores), as does the Apple M1 Max chip (very high speed cores).
Testing out out almost exactly 2X the bandwidth of the M1 Max, the M1 Ultra delivers what Apple claims for memory bandwidth.