Thanks I'll try those.
I didn't make it!
Try using a differnt video card and see what you get. If not try anthor monitor and you're problem should be fixed!
It's definitely a combination of your monitor not picking up the signals from your video card. Due to a conflict. I'm guessing that since you are experiencing these problems during games, it would be closely related to heat.
As others have stated, try another video card if feasible.
What temp. should my video card be and how do I check?
Well, they usually have a threashold. I will assume anything below 60 degrees centigrade is safe. To check your temperatures, you first have to know if your card has a temperature sensor on it. Download 'Everest Home Edition', which is a free PC specification program that will tell you pretty much everything.