Good evening, well I'll explain my problem with World of Warcraft Legion.
before I bought my ASUS Strix RX 580 O8G I have a EVGA GTX 750 Ti 2GB SC and I can play Legion in 7/10 Preset without AA. Now when I installed and updated the new GPU drivers I launch the game and the preset set in 5/10, I disable Windows DVR too.
this is my specs:
CPU: AMD FX-8350 @ 4.0 GHz
Motherboard: Asus Pro Gaming Aura 970
RAM: Crucial Ballistix 16 GB 1600 MHz
Actual GPU: ASUS Strix RX 580 O8G (Gaming Mode)
PSU: Corsair CX750M
HDD: Western Digital 7200 RPM WD5000AAKX-001CA0 (For Games)
SSD: PNY SSD7CS1311-120-RB (For Boot)