The issue involves PCIe connectivity, specifically PCIe connectivity for M.2 SSDs. As explained in the platform feature (see page 38), Intel made it first to market with PCI Express 5.0 support with 12th Gen Alder Lake CPUs and the 600 series chipset. The catch is that it’s limited to 16 lanes, which means no native PCIe 5.0 for M.2 storage slots, with add-in cards required for most 600 series motherboards to support PCIe 5.0 SSDs.