Why G400DH can't define my PF790??

我已換最新的Drivers about G400 & PF790!!

So,I only can work on 85Hz的螢幕更新率,看的眼晶好不舒服說~~

(PS): I have overclocked G400DH to G400MAX,so should I use Max's
Bios or drivers??Or just use DH's drivers will be fine??