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- #TRANSFER 3GB USB 2 VS USB 3 FULL#
- #TRANSFER 3GB USB 2 VS USB 3 SERIES#
- #TRANSFER 3GB USB 2 VS USB 3 MAC#
#TRANSFER 3GB USB 2 VS USB 3 MAC#
Three connections were made to USB-C ports, two to the ports on the front of a Mac Studio Max, which Apple merely describes as “USB-C ports” without further details of the standard they comply with. Read rates ranged between 386-406 MB/s, and write rates between 430-435 MB/s.
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In all five connections made directly to a Thunderbolt port on an M1 Mac, using either a USB-C or Thunderbolt 4 cable, connection speed was 5 Gb/s. When connected to an Intel Mac using a USB-C cable, connection speed was given as 10 Gb/s, with typical read rates of 470 MB/s, and write rates of 480 MB/s. markelp and other users have reported similar results using other widely available benchmarking apps. On relatively slow SSDs, dispersion is narrow and reproducibility excellent. Results given are those for Theil-Sen regressions. If anything, that could result in overestimation of the read rate. The procedure detailed as the ‘Gold Standard’ test was followed, without restarting the Mac between the write and read tests.
#TRANSFER 3GB USB 2 VS USB 3 SERIES#
Transfer rates were measured using my free app Stibium, version 1.0 (55), which wrote a total of 160 files of sizes from 2 MB to 2 GB in size to a folder on the SSD being tested, and read those same files back (Series Write and Series Read Tests as detailed in Stibium’s Help reference). Again, each was verified by establishing SuperSpeed+ 10 Gb/s connections to an Intel Mac.Ĭonnection speeds were read from the SSD’s entry in the USB data given in System Information. Each was connected to an Intel Mac (including an iMac Pro) and it was verified that they established connection at SuperSpeed+ 10 Gb/s with those Macs.Ĭables used included a certified Thunderbolt 4 model, and the USB-C (data) cables provided with the cases. In personal testing, these were mounted in basic UGREEN and similar cases claimed to be compatible with USB 3.1 Gen 2. Additional results used were obtained on other M1 models.Ī range of different external SSDs was used, using Crucial and Samsung SATA SSDs.
#TRANSFER 3GB USB 2 VS USB 3 FULL#
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USB 3.2 adds two-lane SuperSpeed+ at 10 and 20 Gb/s.Ĭurrently, Apple makes no claims that any ports on its M1 models support USB 3.2, only the more widespread USB 3.1 Gen 2 standard.USB 3.1 Gen 2 adds SuperSpeed+ at 10 Gb/s.USB 3.0 onwards supports SuperSpeed USB at 5 Gb/s.For the purposes of this article, I’ll gloss over a lot of detail and summarise the relevant features as: Unfortunately, standards and terminology for USB 3.x are confusing. This article examines why performance experienced by users falls short of Apple’s claim. However, many users have reported performance which doesn’t reach 10 Gb/s for directly connected external disks. Apple claims that all its new models using M1 series chips come with Thunderbolt ports which support “USB 3.1 Gen 2 (up to 10Gb/s)”.