Which one is the bottleneck?

[kamcoindustrial2]

I've just bought a new gtx 1080 ti lightning and a new corsai cs750 power supply. I had gt 630. The problem is that gtx 1080 ti is giving me the same fps (30-50) in dota 2. Usage is around %26-29 on 1080 ti. My current resolution is low (1280x1024) but will upgrade to ultrawide 1080p.
My spec:

Core i7 4770 (not k)
Kingston 1333mhz 8gb ram
1tb hdd and 128gb ssd
Intel DB85FL
750 watt power supply
Gtx 1080 ti

Please help me. A thousand dollar card with 30-50fps is killing me. I will upgrade anything that is recomended by you.

 

[R4DIO4CT1VE]

no real bottleneck, the i7 4770 is a perfectly capable CPU for your GPU. could try reinstalling drivers.

 

[Rexper]

What usage is your CPU cores on?

 

[kamcoindustrial2]

no real bottleneck, the i7 4770 is a perfectly capable CPU for your GPU. could try reinstalling drivers.

refresh windows?

 

[kamcoindustrial2]

My first cpu usage is %50-80 (have never used riva tuner bfr) and others are %4-6.

 

[kamcoindustrial2]

Thanks for your replies guys. I figured out that the cpu was bottlenecking.