Specs: 9950 X3D - 64gb 6000mhz ram, rtx 5090, monitor is a msi mag 1440p 240hz.
My desktop is set to 1440p, 240hz.
-- Steps i've tried; turning vsync on and off ingame, and through nvidia control panel
disabling fullscreen optimizations via windows compatibility
setting process priority higher
several graphics driver versions and driver reinstalls
bottoming out graphics settings
closing every application on my pc and running league from a fresh state
reinstalling /repairing league of course
quite a few others i forgot at this point. --
what boggles my mind here is that this issue is ONLY PRESENT in borderless mode, but NOT windowed mode. it should go with out saying that fullscree