I have a very powerful computer, powerful enough to have an average of 60 FPS at 1080p with DX11 maximum graphics on games like The Division and Final Fantasy XIV even in populated areas with 45+ players on those games. Tree of savior however doesn’t have that luxury:
As you can see, the FPS is 24 or so, and my directx log can be found on pastebin: http://pastebin.com/hUfDZ28G