AMD does not seem to want the Ryzen 5000 processor family to run on X370 motherboards.
AMD’s 300-series chipsets, including the B350 and X370, received substantial processor support for four years. Many X370 and B350 motherboards received official support for the Zen 2 Ryzen 3000 processor family in 2019. Even the Zen 3-based Ryzen 5000 family seemed to work on the X370 chipset, but it does not seem like that.
10 days ago, X370 Taichi and X370 Professional Gaming had BIOS updates listed as version 6.62 in a Reddit thread on the / r / ASRock sub-forum. Now, on the ASRock website, the only update available for these motherboards is 6.40. The update included AGESA version 188.8.131.52 required for Zen 3 processors in the Ryzen 5000 family, and some users were able to install it. Even CPU-Z screenshots were uploaded about it. ASRock Taichi X370 was running Ryzen 5 5600X with version 6.62. On the other hand, an ASRock official shared that the beta BIOS version is not designed for everyone.
Due to this statement, AMD is thought to want to halt ASRock’s efforts to run the latest Ryzen 5000 processors on X370 motherboards. It should be noted that even the Ryzen 3000 series requires some concessions and carries a few caveats. Currently, anyone who owns the X370 Taichi and wants to give the beta BIOS a chance can get it from the / r / ASRock Subreddit.
AMD originally wanted to support the 400 series chipsets with Ryzen 5000 processors. Additionally, the platforms that were originally supported started and ended with the 500-series chipset family. The company also said it has no plans to offer Zen 3 architecture support for legacy chipsets. After the reactions, it was announced that the 400 series motherboards could also receive Zen 3 support.