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Do B450 Motherboads support PCI-E 4.0?

Question asked by paddyb on Jul 19, 2020
Latest reply on Sep 7, 2020 by colesdav

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.