Overclock Improvements are so low

[S.Hamed23]

I have an i5-9600k with corsair h100i with asus z390-f
Recently, I overclocked it to 5gHz @1.31v @LLC(AUTO) @80C max. 
The only Improvement I got is 2749 points in Cinebench R20 where I used to get numbers like 2850-2885 stable.
In XTU, I only got 30 points higher than base clock.
There is no thermal throttling. 
What is the issue?
Checked Multiple times, Each time it's happening

[Stormseeker9]

Did your in game fps improve ?

[S.Hamed23]

1 minute ago, Stormseeker9 said:

Did your in game fps improve ?

Average 4 fps improvement in Apex Legends
Where's the issue man? This cpu delivered more before

 

[Stormseeker9]

8 minutes ago, S.Hamed23 said:

Average 4 fps improvement in Apex Legends
Where's the issue man? This cpu delivered more before

 

Did you check your clocks under load? Could be llc issue perhaps, not sure tho do

[Turtle Rig]

18 minutes ago, S.Hamed23 said:

Average 4 fps improvement in Apex Legends
Where's the issue man? This cpu delivered more before

 

When was the time you were getting higher frame rates.  I want to see what you have done from that time to now to slow it down.

[Tristerin]

Something's not right here, I get about 100 points increase per 100mhz in R20 when OCing.  As for FPS, speaking from my use case on my CPU, for every 500mhz increase I got at least 20 FPS average in games that my single core was the bottleneck.

[S.Hamed23]

11 hours ago, Stormseeker9 said:

Did you check your clocks under load? Could be llc issue perhaps, not sure tho do

every setting is like the way I ocd before
Just the performance dropped. I used to get higher temps like 83C with those high scores but now temps usually don't cross 79C and performance is very low

 

[S.Hamed23]

11 hours ago, Turtle Rig said:

When was the time you were getting higher frame rates.  I want to see what you have done from that time to now to slow it down.

It was with LLC Level 6 @1.31v with the max of 83C. I was getting a cinebench R20 score of 2875-2900.
Those were stable.
Now, with the same settings I'm getting 2772 max with max temps @79C 
I've no idea what's happening

[S.Hamed23]

11 hours ago, Turtle Rig said:

When was the time you were getting higher frame rates.  I want to see what you have done from that time to now to slow it down.

 

11 hours ago, Stormseeker9 said:

Did you check your clocks under load? Could be llc issue perhaps, not sure tho do

 

11 hours ago, Tristerin said:

Something's not right here, I get about 100 points increase per 100mhz in R20 when OCing.  As for FPS, speaking from my use case on my CPU, for every 500mhz increase I got at least 20 FPS average in games that my single core was the bottleneck.

Solved it!!!
I set Corsair iCue an Asus Aura Lighting settings to default
Got the performance bump I had before
Don't mind the current temps. It's at LLC7, in LLC6 it's max at 80C