Your graphics card, CPU, and RAM all work together to create the geometry, textures, lighting, and effects that compose one of those frames. When one component in the chain causes a bottleneck—for example, your CPU tells your GPU to render a large number of objects at once—your PC draws fewer frames per second.

What decreases your FPS?

Low FPS, or frames per second, is when your game slows down because your computer doesn't have enough power or memory to run it properly. Common causes of low FPS are a weak graphics card, old graphics drivers, an outdated CPU, or insufficient RAM.

What affects the FPS the most?

The largest contributing factor to a game's frame rate or FPS performance is the graphics card and CPU. In basic terms, the computer's CPU sends information or instructions from programs, applications, in this case, the game, to the graphics card.