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"Eventually, Zen 4 was announced alongside the Ryzen 7000 Series it’ll debut on at an AMD event on 29 August. Only four desktop processors have been revealed so far, all of which will be available from 27 September.
No more Zen 4 CPUs are expected until 2023, with Ryzen 7000 mobile CPUs likely to be revealed at CES in January. We may see more desktop processors using the architecture at the same event, although that’s not been confirmed by AMD."