rockie_ :
i ve already told you . your mobo supports overclocking well . if the GPU was GTX 970 /980 , there would be a huge difference but it s not . btw , i5 or i7 ?
GPU's do not create performance bottlenecks, as visual quality is adjustable. CPU's create performance bottlenecks. So yes, a CPU upgrade will make a huge difference regardless of what GPU it is paired with.