Video Card Problem? Help!?

okay so i recently was playing left4dead when my monior completely freezes on me. It makes a huge distortion of pixels with different colors on my screen. I restart my computer and whenever i try to play any game it freezes and does the pixel thing on the monitor again. finally i restart my computer to the point that i get the pixel clusters on my monitor right when i start up my computer. this is the first time it has ever done anything like this in two years. Please Help! Did my Video Card Overheat? Was it my 2 gb of g skill ram that did this? I cleaned out my case and booted it up and the same thing happened. Please Help!|||What are your system specs?

Do you have the latest video card drivers? It might be that your drivers arn't updated. Or is it a new video card? The old drivers from the old video card can be clashing with the new one.

Try reinstalling the drivers or get the latest ones.