You are looking for ITX. Just buy the one that’s best priced with the stuff you need. It’s not like you got any options. B550i x570i are all expensive rip-offs.
Also not sure why you entirely need the latest chipset in ITX format as you can’t expand in that format. I would imagine a B450 or X470 chipset is plenty for 2K gaming rig.
500 chipsets gives loads of pcie lanes and offers PCIe Gen 4. But PCIe 3 is more than enough atm for 2k gaming and with the 400 chipsets pcie lanes you are still not going to take advantage of all of them. Hell even some of the 300 series chipsets will be ok for ITX gaming it is just a matter of if the VRM can handle overclocks as airflow will be an issue.
Also not sure why you entirely need the latest chipset in ITX format as you can’t expand in that format. I would imagine a B450 or X470 chipset is plenty for 2K gaming rig.
500 chipsets gives loads of pcie lanes and offers PCIe Gen 4. But PCIe 3 is more than enough atm for 2k gaming and with the 400 chipsets pcie lanes you are still not going to take advantage of all of them. Hell even some of the 300 series chipsets will be ok for ITX gaming it is just a matter of if the VRM can handle overclocks as airflow will be an issue.