In this case, the CPUs it is working on are supposedly the Ryzen 9 5900 and Ryzen 7 5800, and yes, those are both “non-X” variants of the currently 5900X and 5800X. Specific details are still out in the clouds, but going by AMD’s track record, it’s pretty clear what we can expect from the two components.
— 188号 (@momomo_us) January 9, 2021 In the past, non-X Ryzen CPUs tend to be slightly gimped than their X-factored counterparts. By that, we mean that their boost clocks were typically 100MHz lower. Besides that, though, the technical specifications between the two are pretty much identical; in the case of the 5900, it’s likely to still be a 12-core CPU and have a massive 70MB Total Cache. Likewise, the 5700 is expected to run on 8-cores and a 36MB Total Cache. One important point to note: even despite losing the “X” moniker at the end, and unlike their “non-K” counterparts at Intel, these CPUs are still overclockable. On a related note, there’s also a leaked image of an alleged Ryzen 7 5700G, which is technically a slightly less powerful 5800X CPU, paired with a Vega integrated GPU. Specs-wise, it’s supposed to use a Zen 3 “Cezanne” chip, meaning that it will be based on the 7nm die lithography and still bear the same 8-cores and 16-threads. There’s still no official availability date, but there is speculation that AMD may announce it this week during its keynote for CES 2021. Further, there’s also a very good chance that both the Ryzen 9 5900 and Ryzen 7 57800, as well as the Ryzen 7 5700G may be exclusive to OEMs. At least, until AMD decides to make them available to the masses, just as it did with its Ryzen 3 2300X. (Source: Hot Hardware, Techspot, 188号 via Twitter)
