DDR5 but no PCI Express 5.0While Intel's Alder Lake-S processors will support both DDR5 memory and PCI Express 5.0 technology, it seems AMD's Socket AM5 will stick with PCI Express 4.0. According to ExecutableFix, PCI Express 5.0 will be limited to AMD's "Genoa" EPYC server processors.
Socket AM5 will use a 1718-pin design and will support dual-channel DDR5 memory. The first motherboards with Socket AM5 will use AMD 600-series chipsets. ExecutableFix also claims that the Zen 4-based processors will retain the 40mm square size of AM4 based package.
It is rumored that the first consumer Zen4 and AM5 products are to be codenamed, Raphael. Previous rumors have suggested that we might see Raphael launch in 2022. In fact, even late 2022 was mentioned. This would suggest that the Intel Alder Lake platform would not only be first to market but also support both DDR5 and PCIe Gen5 long before the AMD AM5 platform. -- VideoCardz
No PCI-e 5.0, looks like that is only for Genoa— ExecutableFix (@ExecuFix) May 22, 2021