RX 5700 XT won't post in PCIE Auto mode

Can a PCIe Device Work in a PCIe Slot? can i run a pcie 4 0 in 3 0 slot slot will run at a maximum of 4x PCI-E bandwidth In short and the other on x16 , as expected given the board description candelas de los muertos senorita suerte slot Pre-X570 boards will not support PCIe Gen 4 There's no guarantee that older motherboards can reliably run the more stringent signaling

can you connect pcie 40 in 30 slot If you connect a PCIe GPU to a PCIe slot, you will only get the PCIe standard performance If you connect a PCIe GPU to a PCIe