I'm sorry if this is in the wrong section, i was not sure where to post it.

i am currently 3-boxing (5boxed before summer but dont have as much money now) I have two screens. I have my main on a square screen and my other two split on a widescreen. If I were to take out the widescreen and just have the two other instances of WoW running in the background do they effect the video graphics performace at all?