So I have a computer shop business, I have a problem on my computers and two of them has a problem on display. I have a 150 units and all of them are benq monitor, gigabytes motherboard, and nvidia geforce 780 products. The problem is that in the display, it wont go 144hz. So. What I do last because I already check everything and is that I change the unit (the one that doesnt go 144hz all of them. And change it to another working PC that goes 144hz(already been tested). And somehow the problem still the same.
What might be the case of this problem?
What might be the case of this problem?