Asus PB278Q DP -> miniDP overscan issue

Hi,

I have a mid 2011 macmini (i3 CPU, intel 4000hd VGA, ect.) and last week I bought a high res monitor. At first I tried to connect them to each other using hdmi cable with no success because officially only 1080p/i is supported. After browsing a bit I was succeed using switchresx, but only with 40Hz refresh rate.

After that I ordered a miniDP -> DP cable and tied to connect the monitor with the mac. At this time the native 2560x1440 resolution was visible in display options, but when I set it up osx shrinked the screen about 1 inches every side. So using macmini with a standard miniDP to DP cable I'm getting a terrible overscan issue.

I' very curious, how to solve this, because as I think connecting an external display to a Mac shouldn't be such a big thing.

I never thought that connecting a computer to a monitor (using the officially dedicated connector and cable) could be a problem.

Any tips or advice would be good, I would like to use my monitor and computer together. I'm an apple fan but I'm a bit disappointed, because one of my favorite things was the simplicity and usability till this time..