1080TI bottleneck

[Zkorax]

A couple of months ago I've noticed lots of benchmarking on the 1080TI with a good CPU combo such as the i7-8700k and they had about 200 Fps at a specific game with a specific setting. While I have the same setting going on with an i5-6600k, i've experienced a much lower fps almost half of their results (100-120) Fps, so I was wondering if the i5-6600k was the main reason for bottlenecking the 1080TI's performance that much if not then what else could be contributing to that or what is the reason. Also what else should do you guys think will pair up well with the 1080TI and what exactly should I change ? (BTW playing on 1080p and ik ik.. why did I get the 1080ti for ? it's a long story).

Specs: 

GPU) EVGA GeForce GTX 1080 Ti FTW
CPU) Intel Core i5-6600K Processor
RAM) Corsair Vengeance 8GB DDR4 DRAM 2666MHz
MotherBoard) ASUS Z170 PRO GAMING
HDD) 3TB HDD 6gb/s 65mb
SSD) Crucial MX500 500GB SATA SSD
PSU) XFX Force TS 750W 80 Plus Gold Power Supply
Cooling) COOLERMASTER HYPER T4 Processor Cooler
 

[Spotty]

6600k would likely bottleneck the 1080 Ti at 1080p. The graphics card just simply won't have enough work to do.

What monitor are you using?
What games are you playing? What settings?

[Princess Luna]

Not only the CPU but Memory also matters, they usually will use something like Dual Channel 2x8gb(16gb) 3200mhzCL14 memory while you only got a single channel 2666mhz 8gb of memory.

 

And yes the i5 6600K being a 4c/4t only CPU is outdated for high end gaming with such a fast GPU like the 1080 Ti.

[Zkorax]

10 minutes ago, Spotty said:

6600k would likely bottleneck the 1080 Ti at 1080p. The graphics card just simply won't have enough work to do.

What monitor are you using?
What games are you playing? What settings?

I'm using BenQ 27 Inch - RL2755HM

Games I play are like: (Always at max or high-performance settings)

GTA V

PUBG

OverWatch

Destiny 2 

BO4

Battlefield V

 

[Spotty]

1 minute ago, Zkorax said:

I'm using BenQ 27 Inch - RL2755HM

Games I play are like: (Always at max or high-performance settings)

GTA V

PUBG

OverWatch

Destiny 2 

BO4

Battlefield V

 

Your monitor is 60hz - this means it only updates the image 60 times per second. If you're getting only 100-120FPS, it really doesn't matter since your monitor can only display 60fps.
Just enable the FPS caps/Vsync in games to limit the FPS to your monitors refresh rate and save up for a better monitor and better CPU to pair with the 1080ti.