GPU-Z says RX 5700 runs on PCIE v4 on an A320M motherboard… (don't get your hopes up, GPU-Z is probably drunk) : r/Amd
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