These are meant to reflect real-world data transfer speeds for various technologies and specifications, when moving an easy-to-copy file over the connection using a device that can saturate the link (i.e., best case scenario). The speed column is always in megabytes per second (MB/s), for consistency.
| Connection | Speed | Notes |
|---|---|---|
| USB Low Speed | 0.1 MB/s | 1.5 Mbit/s |
| USB Full Speed | 1 MB/s | 12 Mbit/s |
| ATA-33 (UDMA Mode 2) | 30 MB/s | |
| FireWire 400 | 35 MB/s | |
| USB 2.0 | 40 MB/s | |
| ATA-66 (UDMA Mode 4) | 53 MB/s | |
| ATA-100 (UDMA Mode 5) | 65 MB/s | |
| ATA-133 (UDMA Mode 6) | 70 MB/s | |
| FireWire 800 | 75 MB/s | |
| Gigabit Ethernet | 100 MB/s | |
| SD UHS-I | 100 MB/s | |
| SATA 1.5 Gbit/s (SATA I, SATA 1, SATA-150) | 110 MB/s | |
| XQD 1.0 | 170 MB/s | 0.5 GB/s (PCIe 2.0 x1) |
| 2.5 Gigabit Ethernet | 250 MB/s | |
| SATA 3 Gbit/s (SATA II, SATA 2, SATA-300) | 260 MB/s | |
| SD UHS-II | 300 MB/s | |
| XQD 2.0 | 380 MB/s | 1.0 GB/s (PCIe 2.0 x2) |
| USB 3.0 (USB 3.1 Gen 1; USB 3.2 Gen 1×1) | 400 MB/s | 5 Gbit/s |
| 5 Gigabit Ethernet | 500 MB/s | |
| SATA 6 Gbit/s (SATA III, SATA 3, SATA-600) | 550 MB/s | |
| USB 3.1 (USB 3.1 Gen 2; USB 3.2 Gen 2×1) | 800 MB/s | 10 Gbit/s |
| USB 3.2 Gen 1×2 | 800 MB/s | 10 Gbit/s (Requires a correcly-wired USB-C cable. Very rarely implemented on devices.) |
| SD Express | 850 MB/s | SD 7.0 (PCIe 3.1 x1) |
| 10 Gigabit Ethernet | 1,000 MB/s | |
| SD Express | 1,300 MB/s | SD 8.0 (PCIe 3.1 x2 or PCIe 4.0 x1) |
| CFExpress 2.0 (Type B) | 1,500 MB/s | 2.0 GB/s (PCIe 3.0 x2) |
| USB 3.2 (USB 3.2 Gen 2×2) | 1,800 MB/s | 20 Gbit/s |
| USB4 (USB4 v1.0 Gen 2×2) | 1,800 MB/s (min.) | 20 Gbit/s; or 2x (40 Gbit/s, USB4 v1.0 Gen 3×2) |
| Thunderbolt 3 | 2,500 MB/s | 40 Gbit/s |
| Thunderbolt 4 | 2,500 MB/s | |
| CFExpress 4.0 (Type B) | 3,000 MB/s | 4.0 GB/s (PCIe 4.0 x2) |
| USB4 v2.0 (USB4 v1.0 Gen 3×2) | 3,100 MB/s (min.) | 40 Gbit/s; or 2x (80 Gbit/s, USB4 v2.0 Gen 4 symmetric); or 120 Gbit/s + 40 Gbit/s using Gen 4 asymmetric |
| Thunderbolt 5 | 6,000 MB/s | 80 Gbit/s |