AMD Overclocking Help

[Geegog]

CPU: FX-8350

Mobo: Gigabyte 990FXA-UD3

 

I've been using easytune to overclock my cpu. I have it set on "Extreme" to get 4.5 gHz. However, when running cinebench, this is what Open Hardware Monitor reads 

 

https://gyazo.com/c0cb2c4ed82fef476b0484148d8b108c

 

I noticed that some cores are running at 4119MHz instead of the rest being 4320. It also changes cores randomly.

 

This was taken a few seconds after 

 

https://gyazo.com/e59956852f374b70c62f980a3c8aa4d8

 

I have no clue why most of the cores are running at 4320 when they should be at 4521 due to cinebench running 100% CPU. 

I have no past experience with overclocking and have no clue what I'm doing. Any and all help will be appreciated.

 

Thank you!