Usb

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USB 3.x

Specification Name Transfer speed Actual transfer speed
USB 3.2 USB 3.2 Gen 2x2 20 Gbit/s = 2.5 Go/s = 2.33 Gio/s 950 Mo/s
USB 3.1 USB 3.2 Gen 2 10 Gbit/s = 1.25 Go/s = 1.16 Gio/s 540 Mo/s
USB 3.0 USB 3.2 Gen 1 5 Gbit/s = 625 Mo/s = 596 Mio/s 3.2 Gbit/s = 400 MB/s

USB 2.0

  • High Speed: 480 Mbit/s → 60 Mo/s
    Due to bus access constraints, the effective throughput of the High Speed signaling rate is limited to 280 Mbit/s → 35 Mo/s.
  • Full Speed: 12 Mbit/s → 1.5 Mo/s
  • Low Speed: 1.5 Mbit/s → 187 Ko/s

USB 1.x

  • Low Speed: 1.5 Mbit/s → 187 Ko/s
  • Full Speed: 12 Mbit/s → 1.5 Mo/s

Clés USB

Benchmark: gnome-disks (paquet gnome-disk-utility)

SanDisk Ultra Fit SanDisk Ultra Dual Toshiba TransMemory U302 SanDisk Cruzer Blade
USB 3.0 3.0 + micro-USB 3.0 2.0
Lecture 150 Mo/s 130 Mo/s 115 Mo/s 27 Mo/s
Écriture 45 Mo/s 9 Mo/s 6 Mo/s 6.5 Mo/s
Operating temperature 0°C - 45°C 0°C - 45°C 0°C - 50°C 0°C - 45°C