Hello all, got a second monitor for my MacBook Pro today, plugged it into my mac by using the DVI to MiniDisplay Port to allow it to display. I've got the monitor set to "Best for Display" which when I go to scaled is 1080P, however this does not fill my screen completely. I have attached a pic so you can see what is going on with it. I'm running OSX 10.8.5 if that is of any help.
Red lines indicate the space between the frame of the monitor and where the displayed content actually is.
Any help would be appreciated!

Red lines indicate the space between the frame of the monitor and where the displayed content actually is.
Any help would be appreciated!