System: 6850K@4.4Ghz HT on, 1080Ti FE@1950Mhz, DDR4-3000@CL13-12-12-32-1T
Battle 1080p:
Med: 180.9 (125-245) fps
High:130.2 (96-158) fps
Ultra: 94.4 (81-116) fps
Ultra + Extreme Shadows + Extreme Unit Size: 76 (56-108) fps
Battle 1440p:
High: 84.5 (75-98) fps
Ultra: 64.2 (57-75) fps
Update: Patch from 28th May seems to have essentially identical performance
Tip: If somebody struggles with CPU limited performance, don't forget to optimize DRAM speed (besides OC CPU). TW games seem to be pretty DRAM speed and also latency sensitive. In Attila I could measure up to 40% more frames from just doubling the RAM speed (see my post here: https://www.twcenter.net/TWC-Total-War-Attila-benchmark-thread). And TW3K seems to like fast RAM too.