According to the official AMD CPU price list, originally spotted by Videocardz.com, both the Ryzen Threadripper 1950X and the Threadripper 1920X will have the same 180W TDP. The 16-core/32-thread Ryzen Threadripper 1950X works at 3.4GHz base and 4.0GHz Turbo clock and will come with a massive 40MB cache (L2+L3). 

The 12-core/24-thread Ryzen Threadripper 1920X works at 3.5GHz base and the same 4.0GHz Turbo clock will have 38MB of total cache. 

AMD has previously announced that these will launch on August 10th with SEP (suggested e-tail price) set at US $999 for the Threadripper 1950X and US $799 for the Threadripper 1920X. The 8-core/16-thread Ryzen Threadripper 1900X, with US $549 SEP comes on 31st of August and there are still no details on the TDP of the total cache amount.