The existence of the TU116 GPU, which exists to deliver Turing-level performance without ray-tracing, has been established at this stage. Today (February 14, 2019), VideoCardz has posted what it describes as exclusive images of this chipset. It also has pictures of what may be the MSI Ventus XS 1660 Ti, a card purportedly based on the TU 116.
https://www.notebookcheck.net/This-is-how-the-new-NVIDIA-TU116-GPU-may-look.407731.0.html