I'm running a setup with a R7 1700, GTX 1070 and 32 GB RAM, which is quite overkill for pretty much anything. When I walk around in Honor Hold with everything on max and all addons disabled I only get 80-85 FPS. The 1700 is clocked to 3.75GHz.
I've had performance issues running older versions of World of Warcraft on Windows 10 on certain systems. For me, having the Visual C++ Redistributables installed has fixed it. I honestly couldn't tell you exactly which one fixed it since I didn't bother go into such detail on my research, I just installed most of them except the newest ones - the version of WoW I'm playing wasn't out when the newer redistributables were released after all.