If you’ve ever shopped for a motherboard, GPU, or SSD, you’ve seen the term “PCIe Gen X.” But what do these revisions actually mean? Let’s break it down. Each new PCI Express (PCIe) revision doubles the bandwidth (data transfer speed) of the previous generation while remaining fully backward and forward compatible. Speed Comparison (Per Lane – x1) | Revision | Bandwidth (per lane) | Year Introduced | | :--- | :--- | :--- | | PCIe 3.0 | ~1 GB/s | 2010 | | PCIe 4.0 | ~2 GB/s | 2017 | | PCIe 5.0 | ~4 GB/s | 2019 | | PCIe 6.0 | ~8 GB/s | 2022 |

PCI Express Revisions Explained: What’s the Difference Between Gen 3, 4, 5, and 6?

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PCI Express Revisions Explained: What’s the Difference Between Gen 3, 4, 5, and 6? pci express revision