144Hz how many FPS

Yes, and it also limits your FPS to your refresh rate. With a 60hz monitor, v-sync stops FPS from going beyond 60, with a 120hz monitor, that cap is 120 FPS .

A 144Hz monitor can display up to 144 FPS , more than double that of a standard 60Hz panel, which is capped at displaying 60 FPS. To put it another way, a low refresh rate monitor bottlenecks the frame rate you see, but monitors with higher refresh rates enhance your gaming experience.

example: you have a computer with an AMD graphics card, this monitor supports 144hz, that means that you need a minimum of 144 fps on a game to use 144hz. refresh rate = how many times A PIXEL can be shown per second. fps = rendered frames per second.

To see 120fps, you need a 120Hz monitor and a computer capable of producing 120fps (so that the limitations and maximums are the same, giving you 120fps viewable).