Appearing on Chiphell forums, this little quad-core SKU, which is stuck with four threads as it does not have enabled simultaneous multithreading (SMT), is actually quite an overclocker as it managed to hit 4.3GHz on Biostar's X370 Racing motherboard at 1.38V. This puts the Ryzen 3 2300X in level with the Core i3-8350K, one of the most interesting Intel entry-level CPUs.
Earlier rumors suggested that the Ryzen 3 2300X works at 3.5GHz base and 4.0GHz Turbo clocks, has 8MB of L3 cache, and as all Ryzen 2nd Generation CPUs, is made on 12nm manufacturing process and Zen+ architecture so it should support XFR2 and Precision Boost 2 technologies.
In addition to the Ryzen 3 2300X, AMD is also expected to release the Ryzen 5 2500X, both of which should launch together with the new mid-range B450 chipset motherboards.
Hopefully, these entry-level/mid-range CPUs should launch soon.