HD7870-DC2-2GD5-V2 bad fps

[horpion]

Hi for all.

Finally install for my and pc Sierra, but have one problem.

My spec:

And fx-8370E 4.2 GHz

Asrock 970 PRO3 V2.0 (think about change to Asus m5a97 v2.0)

16 gb ddr3

hdd 2 TB 7200

asus hd radeon 7870 v2.0

 

So video work normally but when I try to start games I have low fps. In windows I have 70-90 fps, in Mac 13-25 fps

 Doing all, change all frame buffers, read topic how to change fb for card with my card ports- but nothing changes.

 

So finally ask for help) Because all time reboot to windows only for games and than reboot to Mac not normal))