WOTLK - Very good pc - low fps!!

Hello I am really confused and sad...

On WoD I got without Vsync around 170fps on Ultra.

On Wotlk here, I got only 56fps without Vsync...and the Screen isnt really "smooth"...

my pc specs:

R9 280x Tri Vapor gfx card
Intel i5 4460 Processor
8GB DDR3 RAM
SSD 256GB

Some1 has similiar issues or a fix? :(
It is really no fun to play with that fps...

Some addons are causing FPS drops, try disabling them if you are using any.

I'm on the same boat, ATI is ****ing ****. I don't think there's any solution for this, I have tried everything I have thought of.

yea...that sucks