This is becaus of the standard Tesselation settings in the AMD driver.
Had that issue with my 6900xt, too.
Just go to the driver and change the tesselation options to eighter "amd optimized" or "~ managed by application". Maybe you have to set some other options to switch it on.
In Adrenaline you will find them by clicking the gear wheel symbol on the upper right, then in the second tab (from memory it is "Graphics", next is "Display") scroll down to the bottom and open the advanced setings.
For other AMD users who will see the full hair, but a bit too thin to look like the creator's pictures: try to play with that tesselation settings and those other advanced stuff, too. You will be surprised.