In order to get the full benefit of 144Hz, your game or application needs to run at 144 frames per second. Most high-end NVIDIA or AMD graphics cards will support 144 Hz at different resolutions. Finding an application like Windows Game Bar (Windows Key + G) to monitor your framerate while playing a game will show you if your graphics card is capable of supporting 144hz. Remember also, in order to experience the benefits of this refresh rate both your monitor and your connecting cable must support it. More demanding games and higher resolutions make it harder to reach 144 Hz.