Can someone clarify the situation with B450 boards and PCIe 4.0? About to build my first system and have have decided on a Ryzen 5 3600 paired with a B450 board. A 570 board is just pushing my budget too far, but being able to utilise PCIE 4 at some point in the future might be useful. As I understand it, it theoretically should work with some boards and was included in older BIOS, but has been removed from updates at the request of AMD. If this became a feature that I could make use of in the future, would I be able to flash an older BIOS to make use of it? I’m not a gamer, so won’t be needing a top spec GPU, but do a lot of video work and seriously multitask and want to build a machine that will have a reasonable upgrade path to that will last me a few years.