Best Buy: XFX AMD Radeon RX 5700 XT 8GB GDDR6 PCI Express 4.0 Graphics Card Black RX-57XT8MFDR
PCIe 4.0: What's New and Why It Matters
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
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