ASUS service and support website has already listed the upcoming GeForce RTX 3080 Ti graphics card. According to ASUS, GeForce RTX 3080 Ti graphics cards will have 20GB memory, and two ASUS RTX 3080 Ti cards are: ROG Strix RTX 3080 Ti OC Edition Gaming Graphics Card and ROG Strix RTX 3080 Ti Gaming Graphics Card.
RTX 3080 Ti is expected to feature GA102 GPU with 10496 CUDA cores, the same number as the flagship RTX 3090. It would appear that RTX 3080 Ti will simply offer less memory (20GB vs 24GB) and carry a lower TDP, to better combat Radeon RX 6900 XT series.
The release date for RTX 3080 Ti cards are expected in February, 2021. Stay tuned for more info.