I'm using a HP f2105 display utilizing DVI I'm also running an extended display utilizing HDMI and there is no problem with that screen. I don't know if my problem is hardware, software, or memory, worst of all I don't know what you call this problem but I took a screen shot of it, if I right click the desktop and choose change resolution and perform the resolution change it goes back to normal. I hope I can leave a screen shot picture of the screen messed up. If I were to describe the screen it would be a gobbly beloved patriot of different colors or what a child would color in his/her coloring book if he/she had never colored before. It very seldom happens but it's been doing this for years and I am curious.