Source from this listing:https://bitnand.com/product-page/nvidia-geforce-rtx-2080ti-fe
GTX 1080Ti vs RTX 2080Ti
Memory speed: 11Gbps vs 14Gbps (+27%)
Size: 11GB vs 11GB (same)
Interface width: 352-bit vs 352-bit (same)
Memory bandwidth: 484GB/s vs 616GB/s (+27%)
If 1080Ti is mining at 55MH/s with the pill, then we can expect the new gen RTX 2080Ti to get up to 70+ MH/s mining Ethereum. This makes it easily the fastest, or at least on par with TITAN V card... until AMD comes up with new stuff.