The Ryzen Threadripper 3990X is viewable in the Software database. It's not really surprising to see how close the processor to the SiSoft reference material is before it gets started.
The base clock of the 3990X is 2,900 MHz and 800 MHz lower than that of the high-end model with 32 channels. It has a boosting frequency of 43 GHz. The maximum increase is set to 4.3 GHz – 4.5 GHz for the 32 core