The problem definitely isnt with heating because it doesnt get up to gaming temperatures when artifacting. Before it started artifacting, it would go up to about 63-66C every time I did anything at all that involved the graphics card, even run a GBA emulator. Now with artifacting, it tops out at 58 (highest I've seen it go), which means (or would appear to suggest) that there is something hindering the function of the GPU, be it software or hardware malfunction. I have cleaned out my system as I said before, and I did see two dust bunnies in the fans. I tried to remove them with a needle, but gave up and figured I was satisfied with the job I had done after removing a dustbowl from the inside of my laptop.
There does, however, seem to be a correlation between artifacting and heat dissipation in this case. If I turn the fans on turbo, it will slow the eventual artifacting, however it will not stop it from completely destroying any hopes for gaming for over 10 minutes at a time. I have taken a couple of screens in an effort to help explain.
This is what UT2K4 looks like about 3 or 4 minutes into it. Rapidly appearing/unappearing triangles take over your screen in a mess that resembles something of an animal being slaughtered infront of you, and its insides being thrown against your screen...in 32x speed.
This is what happens after you get out of the game and try to go to a website. It starts artifacting pretty badly like this if you try and scroll down.
Hope this helped spark a bit more interest in this particular problem and/or solved a couple questions.