Performance issues on WOW - RX 5700XT R5 3600x

Hello,

I have a problem with my AMD config on World of Warcraft, I have an Sapphire Nitro + RX 5700XT and a Ryzen 5 3600x with the basic Ventirad.

Here is a screen: [CANT POST]

You should know that before this config I had an RX 580 Nitro + and a Ryzen 5 2600 and I had exactly the same problem on the same game.

That is to say that whatever the graphics, my resolution, the changing performance is very little I am almost sure that it comes from my CPU which does not run at full speed or which is too soft, I do not know how to adjust it.

I took a small record at stake with different parameters: [CANT POST]

But you should know that when I leave the city and I go to an empty space at the bottom I manage to reach 300 + fps in 1440p.

So if anyone knows the cause of this problem or even knows how I could fix my processor I would be super grateful, knowing that this is the second time I have this problem and it is really starting to hit me on the system. Then I am sure that the other games must have the same concerns but since they are not very greedy CPU level I should not have noticed.

Thank you for your attention, and sorry for my bad english.