The most likely launch date at this point is somewhere towards the end of October. It's unknown when NVIDIA will release the RTX 3060 (non-Ti), that model is expected to be based on the GA106 GPU.
Some specifications were also posted by the site, as well as a claim that the RTX 3060 Ti has a 200W TDP for the custom models, which may point to a 180W TDP for the reference model.
The NVIDIA GeForce RTX 3060 Ti will feature GA104-200 GPU with 4864 CUDA cores (1024 cores or 8 SMs fewer than RTX 3070). Similarly to RTX 3070, this model will feature 8GB of GDDR6 memory clocked at 14 Gbps. The bus width will remain at 256-bits and this should provide 448 GB/s of bandwidth.The RTX 3070 is expected on October 15th.