PCIe 3.0 VS 2.0: What are the differences and similarities? - EaseUS
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Can You Use a PCIe Express 3.0 Card In a 2.0 Slot? - ElectronicsHub
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AMD Radeon RX 6400 Tested on PCI-Express 3.0 | TechPowerUp
Bifurcation on PCIe* 3.0 x16 Intel® NUC 9 Extreme/Pro Kits