Dell is listing an unannounced processor from AMD. For the ZEN3 AMD only has launched the X model, however, system builder Dell is now listing a Ryzen 7 5800.
Likely these are OEM-based SKUs, not intended for retail, the 8-core part seems to get a slightly lower max boost frequency of 4.60 GHz, (4.70 GHz 5800X). What might be substantially different though is the base frequency, however that's not listed. In the past, AMD already released an OEM Ryzen 9 3900 12-core processor.
It's an interesting spot, and let's wait and see of at all these non-X model finds a wat tor etail.
AMD Ryzen 7 5800 (non-X) Spotted