By contrast, Oakley confirmed that read speeds on M1 Macs ranged between 386 Mb/s and 406 Mb/s while write speeds were between 430-435 MB/s.Ĭonnecting to one of the two ports on the front of the Mac Studio using a Thunderbolt 4 cable produced terrible performance at 20 MB/s reads and 37 MB/s writes. As a control, the Intel iMac Pro recorded 470 MB/s read speeds and 480 MB/s write speeds. The actual tests included transferring 160 files ranging in size from 2 MB to 2 GB. He also ensured that only certified Thunderbolt 4 cables were used. For context, USB 3.1 Gen can transfer up to 10 Gb/s. Oakley first determined what the theoretical speeds were by connecting the external SSDs to an Intel iMac Pro and verified that USB 3.1 Gen 2 was supported. ![]() The tests suggests that although both Macs support Thunderbolt 4, they don’t support the USB 3.1 Gen 2 standard, hindering transfer speeds. ![]() He also used a range of external SSDs from both Crucial and Samsung. ![]() Howard Oakley from Eclectic Light performed different tests with the 2021 16-inch M1 Max MacBook Pro and a 2022 Mac Studio, also with the M1 Max. That’s what some M1 Mac pro users are reporting after several transfer speed tests. Imagine paying for an expensive Mac only to discover you’re not getting full Thunderbolt 4 speeds.
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