https://wccftech.com/amd-ryzen-threadripper-3990x-3970x-3960x-launch-leak/

AMD Ryzen Threadripper 3000 series family launch dates have been confirmed in the latest leak by Videocardz. The leak confirms three planned SKUs along with the upcoming AMD TR4+ boards that will be available on launch day in November.

AMD seems to be announcing three 3rd Gen Ryzen Threadripper processors in November, these would include the Ryzen Threadripper 3960X, the Ryzen Threadripper 3970X and the Threadripper 3990X. There's no mention of the Ryzen Threadripper 3980X by the source but that could launch later on after the rest of the lineup is unveiled.