The Return of the King: Performance issue

[euramer]

Hello,
Could somebody gives me some advice on the parameters needed or explain why I cannot run this map using a 4K screen?
I have PC which is 6 month old with an i7 of the 9th generation, 16 Gb, an SSD and a Nvidia 2060, why are the animations and movements snail like?
I have tried to reduce the quality using some parameters, but to no mesurable change.
If I am using a standard UHD screen (1080) I don't have the same problems.
Thank you for your help!

[euramer]

I have found the origin of the performance problem: It is not the game, but the fact that the electricity plug was out of order.
When my Portable PC is running only on batteries, to increase its endurance, the processors clock and the video card clock are automaticaly reduced to the minimum setting.
With a correctly connected powersupply, no problems.