PCIe 4.0 vs PCIe 3.0 on RX 5700 XT (Latest Drivers 2020 Adrenalin 20.2.1) - YouTube
Amazon.com: XFX RX 5700 XT Raw II 8GB GDDR6 1905MHz 3xDP HDMI PCI Express 4.0 Graphics Card RX-57XT8OFF6 : Electronics
Amazon.com: Gigabyte ASUS AMD Radeon RX 5700 XT PCIe 4.0 VR Ready Graphics Card with 8GB GDDR6 Memory and Support for up to 6 Monitors (RX5700XT-8G) : Electronics
5700XT Graphics card is running at PCI-Express x4 v2.0 when gpu-z says it supports PCI-Express x16 4.0 : r/AMDHelp