See the system specs below. Here is the problem. It has not happened to me, but my wife keeps saying that when she is surfing, or scrolling through a large document, 2D, the screen goes crazy, and she loses it, or it rolls, or just goes plain wonky. I noticed that my 2d clock speed is 400, and my 3d clock is 425......I remember reading that I should set my clocks on the Ultra to 425 for both......is this true. Like I said, it has not happened to me, but it happens to my wife quite frequently....and she is very computer literate, has a computer science degree and builds her own computers, etc, etc. Any help or info would be greatly appreciated.