why is my GPU usage so low?

[Rohitashwa Sengupta]

while playing crysis 3, my gpu is used 90% in lite zone and 60-75% in hard zone.. i heard people have 99% gpu use all the time while playing this.. why i have so low usage? i have a 650 ti boost along with an fx 4130.

 

[Seladon-1370374]

Your CPU is bottlenecking you.