I've had nothing but problems with ATI products in people's pc's.

example. I went to replace a bad cdrom drive in a persons pc, took out the old and put in the new. Anyone that's worked at all on hardware knows this is a very simple process. Boot up the pc again and now the video driver is gone. Not there and not working, not the wrong one. Simply gone. Any trace that it has an ATI card was gone. I'd normally blame windows, but I've seen the strangest problems happen when ATI products are involved.