I found the following comparison between a 1080ti and 2080ti @ 4k not sure how accurate they are
https://www.3dcenter.org/news/angeb...tx-2080-ti-um-375-vor-der-geforce-gtx-1080-ti
GTX 1080Ti RTX 2080Ti
Battlefield V 54.5 frames per second 75.2 frames per second
Call of Duty: WWII 50.0 frames per second 61.1 frames per second
Far Cry 5 44.4 frames per second 68.9 frames per second
For Honor 51.7 frames per second 78.3 frames per second
Grand Theft Auto V 61.5 frames per second 78.2 frames per second
Mass Effect: Andromeda 48.4 frames per second 67.3 frames per second
PlayerUnknown’s Battlegrounds 42.5 frames per second 61.6 frames per second
Rainbow Six: Siege 61.6 frames per second 90.1 frames per second
The Crew 2 47.3 frames per second 58.3 frames per second
The Witcher III 44.1 frames per second 56.4 frames per second
AVERAGE - GeForce RTX 2080 vs. Ti GTX 1080 Ti + 37.5%
hanvt seen these posted yet but maybe someone has already