RX 5700 XT PCIe 3.0 vs PCIe 4.0 + Ryzen 3900X - Test in 9 games 1080p and 1440p - YouTube
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
AMD Radeon RX 5700 XT And RX 5700 Bring 7nm PCIe 4.0 Gaming Muscle To Enthusiasts | HotHardware
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