https://www.windowscentral.com/amd-launches-ryzen-9-3900-and-ryzen-5-3500x-processors AMD Tuesday expanded its 3rd generation Ryzen desktop processor lineup with two new product additions, the 12-core/24-thread Ryzen 9 3900, and the 6-core/12-thread Ryzen 5 3500X. Both chips are particularly interesting given their naming. The 3900 is a slightly subdued twin of the company's current flagship, the 3900X, with a small amount of clock speed traded off for a huge drop in TDP. This chip ticks at 3.10 GHz with 4.30 GHz boost, compared to 3.80/4.60 GHz frequencies of the 3900X. Its TDP, however, is rated at just 65 W, compared to 105 W of the 3900X. You get 512 KB of dedicated L2 cache per core, and 64 MB of L3 cache.
The Ryzen 5 3500X is another interesting part, in which the "X" makes a world of difference from the Ryzen 5 3500. Whilst the 3500 is a 6-core/6-thread part devoid of SMT, the 3500X is 6-core/12-thread (features SMT), has the same exact 3.60 GHz nominal clocks as the popular Ryzen 5 3600, but a slightly lower 4.10 GHz boost frequency, compared to 4.20 GHz of the 3600. The Ryzen 5 3500X is expected to be marginally cheaper than the 3600, at around $189, and is currently only being offered to OEMs and system integrators in China. The company hasn't finalized pricing for the 3900, yet.
The lower TDP of the Ryzen 9 3900 is very interesting in my opinion and is probably a good choice for OEMs.