I run at 5120 x 1440 and run DDR4. My main game at the moment is iRacing which greatly benefits from the 9800X3D. I've started to get some heavy dips in performance now so eyeing the upgrade.
if you have a DDR5 board then a 14700k would have been a good upgrade but DDR4 dose make a differance in games so you would need a new board and ram too... in that case the only real option is AM5