https://wccftech.com/amd-zen-3-3d-vache-ryzen-cpus-enter-mass-production-next-month-zen-3-b2-stepping-available-end-of-december-alleges-rumor/

AMD's Ryzen CPUs based on the new Zen 3 stacked chiplet design with V-Cache are expected to enter mass production next month, reports Greymon55. The leaker also states that AMD Ryzen processors with B2 stepping will be shipped and available in the retail segment by end of 2021.

AMD already officially confirmed that their Ryzen CPUs based on the Zen 3 architecture with 3D V-Cache are heading to the AM4 platform in Q1 2022. Based on the tweet, AMD is expected to begin mass production of these chips next month which means that we are probably going to hear more about them at CES 2022 and a launch by February 2022 which gives them a good 9-10 month time on shelves before Zen 4 enters the market.