What is the cause of FPS lag?

Low FPS Is a Computer Problem. ... Frame rate issues aren't caused by network problems. If you have a low frame rate, that's not the game experiencing lag – that's your computer failing to keep up with the game. You may need a faster graphics card, more RAM, or a better CPU.Apr 1, 2013 read more

There are multiple causes of lag, so let's cover the symptoms and solutions for each one of them. Graphics Lag The granddaddy of all lag, this is the result of a general slowdown in graphics, and is a common occurrence for any gamer. read more

Low frames per second (FPS) appear as your entire game behaving slowly. If your frame rate is low enough, playing the game may feel like watching a slideshow as only a few different frames appear on your screen per second. In less extreme cases, the game will feel jerky and slow – just the opposite of smooth. read more