Oh sorry, I didn't post my system.
CPU : Intel Core i5 4440 @3.10GHz
GPU : ASUS GTX 760 2GB GDDR5
RAM : Corsair Vengeance 2X4GB 1600MHz
Motherboard : Gigabyte Z87-HD3
Power Supply : Cooler Master Silent Pro M2 520W
Anyway in the screenshot above you can see the CPU use and it's not at 99%, so...