My PC has intel core i3 CPu and Intel HD graphics 2500 video adapter. According to specs, it supports 2560X1440 resolution via display port, so does my ASUS PB278. However, my motherboard doesn't have a display port, it comes with two DVi outputs. Can I use some knd of active DVI to displayport active adapter to get full 2560X1440, or I need to get an external graphics card.