DDR5 isn't backwards compatible, though, and you can't slot DDR5 memory kits on motherboards that only support DDR4 either. That means you have to pick the right platform for your build ...

The motherboard part of the 600 ... which significantly increased over the AM4 socket, which had 1331. That increase is partly needed for DDR5 and 24 PCIe 5.0 lanes. Four lanes presumably link ...