I get these strange artifacts that move around on my screen when the PC is running. Sometimes it gets so bad that I can't use it at all. It is a Pentuim 4 2Ghz with an MSI NEO2 motherboard and a Radeon 9800 GPU. Changing the refresh rate improves the situation for about 2 minutes as does setting the VGA memory gap in the bios.
I have taken screenshots of the artifacts by using printscreen and then pasting into paint. They show up on the screen dump as well. I can't seem to find a place to add them to this post.