AMD is on cloud nine right now and they intend to push Zen3 CPUs on all fronts. Servers will be next in line for AMD but currently AMD will need to fulfill OEM customers. OEMs prefer to keep their offerings standard so overclocking features are disabled as well some others.
Today, reports have surface that the Ryzen 9 5900 and and Ryzen 7 5800 are being readied for OEM CPUs. The Ryzen 9 5900 is a 12-core/24-thread part. The clock speeds are currently unknown but TDP will be lower than the desktop X-counterpart. It is assumed the part should operate with a 65W TDP rating. Meanwhile the Ryzen 7 5800 is an 8-core/16-thread processor. The CPU frequency is unknown to date but will have a TDP rating of 65W and similar cache configuration like the 5800X with lower clocks.
As an OEM part, these CPUs will not be available for retail but due to demand, we may see tray orders being sold from vendors, usually from China, offering tray-type CPUs with no box. What remains to be seen is the possibility that these CPUs may be small in volume on certain regions so availability to them may still be limited.