To consistently achieve that 400 frames, you need to stabilize your task manager settings.
To consistently achieve that 400 frames, you need to stabilize your task manager settings.
I run my task manager in the background and then start the game.
It's a joke, opening Task Manager next to your game causes it not to render, so your frames keep going because it's just loading the Task Manager.
When you aren't playing, your GPU can handle desktop or simple applications smoothly and quickly. It uses minimal power or has enough to run at high frame rates. In games, the GPU works harder, causing frame drops. You don't control the exact frame rate in games, but achieving 144 fps without interruptions might allow VSync to function properly.