PCI Express Standards Comparison
| Standard | Year Announced | Max Data Rate (per lane) | Max Bandwidth (x16) | Encoding | Link Speed | Comments |
|---|---|---|---|---|---|---|
| PCIe 1.0 | 2003 | 250 MB/s | 4 GB/s | 8b/10b | 2.5 GT/s | |
| PCIe 2.0 | 2007 | 500 MB/s | 8 GB/s | 8b/10b | 5 GT/s | |
| PCIe 3.0 | 2010 | 1 GB/s | 16 GB/s | 128b/130b | 8 GT/s | |
| PCIe 4.0 | 2017 | 2 GB/s | 32 GB/s | 128b/130b | 16 GT/s | |
| PCIe 5.0 | 2019 | 4 GB/s | 64 GB/s | 128b/130b | 32 GT/s | |
| PCIe 6.0 | 2021 | 8 GB/s | 128 GB/s | PAM4 | 64 GT/s | |
| PCIe 7.0 | 2024 | 16 GB/s | 256 GB/s | PAM4 | 128 GT/s |