AM4
AM4
this refers to the different versions and their compatibility with various devices. b350 can run up to zen 2 using a beta BIOS (including zen + APU or 3000 APU). b450 depends on the board and will support zen 3 with a BIOS update (works with zen and zen + APU). b550 only supports zen 2 now, but will get zen 3 with a BIOS update (doesn’t support current Gen APU). x570 matches b350, and x470 is the same as b450. This marks the final year for AM4, with Zen 4 coming on AM5. Edit. Clarification on APU differences provided. Edited July 28, 2020 by TofuHaroto
certain a320 models can run Zen 2 using a beta BIOS, but they won't be compatible with the next Zen 3 release. most a320 boards come with Zen 2 support by default, though it's worth noting that Zen 2 support is not guaranteed for the latest Zen 3 version.
No, I'm not doing a sort by lowest price. I wouldn't even consider it for the cheapest CPU.
Looking for a better sub £60 motherboard with strong upgrade potential?
Which processor? Upgrading for an additional £30 gives you the pro4, likely sufficient for the 4600/4700.