i also have sometimes low fps when im at max settings and turning per pixel off usually gets me back to 60fps im at Eu servers like i should.
my specs are:
Win10
IntelR CoreTM i5-6400 CPU @2.70GHz 2.71 GHz
16 Gt RAM
64-Bit
Nvidia Geforce GTX 660
Samsung SSD 840 EVO 120GB
internet connection: