I bought a new PC about two weeks ago (the GPU only supports HDMI and Displayport) and today I got a Displayport - DVI Dual Link adapter to get 144hz. One problem though, I can't change the refresh rate at all. I can't even lower it. The adapter says it supports 1080p@144hz, it's also active and has Dual Link DVI. Is there a solution or will I have to just get a new monitor?