The problem with the resolution (Call of Duty: Warzone)

Hi! I have a problem. My monitor is 2560x1440 144 Hz. In graphics settings I can't choose all the settings of your monitor. If in fullscreen mode I can only put 120 Hz if in windowed mode to full screen the game runs on 144 Hz, but in the setting of rendering resolution is 3840x2160 (100%). It very strongly loads the videocard. To put the rendering resolution 2560x1440 I can't, there is no such value. If I change the resolution of the rendering in the smaller side, the whole picture will become very blurred. I have a choice. To play in my resolution, but on a 120 Hz or 144 Hz, but with download graphics card under 4K. I have a GeForce RTX 2080. But I can't play normal resolution at a frequency of 144 Hz. In either case, the fps drops to 90-110, even if the settings are reduced and RTX is disabled. The video card is loaded only 5000 of the 8000 memory, and other new games work in Ultra without a single drawdown FPS. All drivers were reinstalled and tested. Who faced such problem?