The bottleneck is when the cpu is powerless then the gpu or the cpu is more powerful than GPU! then you will lose a lot of FPS! this is an example of bottleneck Watch in 10:50 and see the FPS drop Assassin's creed Syndicate: As you see 'Assassin's creed Syndicate' here the cpu bottleneck the gpu , ( 100% Cpu uses) and 44% GPU and than low FPS : 16.2 another example! Rocket League: chouf the gpu uses 97% and cpu nearly 80% and with 63Fps! inchallah nkoun fadtkoum , merci!