The new Zen 4 Ryzen processors will have eight general purpose lanes, of which at least four will be required to be dedicated to an M.2 storage slot (always Gen 5). The other four lanes are up to the motherboard manufacturers. Some boards will use these to implement Thunderbolt 4 (Intel Maple Ridge JHL8540) or USB4 (ASMedia ASM4242). If none of these options are used, these lanes can go towards an additional M.2 slot.
With integrated graphics becoming standard on Zen 4, the first generation of AM5 processors will offer four dedicated display outputs, with HDMI 2.1 and DisplayPort 2.0 being supported, but neither being required as far as we understand. There are also four USB 3.2 Gen 2 (10 Gbps) ports and at least one USB 2.0 port coming from the processor. Three of the USB 3.2 ports also support DP Alt Mode, something we’ve seen several announced boards supporting on at least one USB-C port. This seems to be up to the motherboard manufacturers to implement once again.
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