Usb

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)

Name	USB	Read (Mo/s)	Write (Mo/s)	Access time (ms)	Operating temperature (°C)	Capacity (GB)
SanDisk Ultra Fit	3.0	150	45		0 - 45 overheating	64
SanDisk Ultra Dual	3.0 + micro-USB	130	9		0 - 45	16
Kingston DataTraveler	3.0	185	6	0.78		128
Toshiba TransMemory U302	3.0	115	6		0 - 50	16
Kingston DataTraveler micro	3.1	117	2.6	0.88		128
SanDisk Cruzer Blade	2.0	27	6.5		0 - 45

	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