Although it's a good deal outdated now, I actually still use Q3A for artifact/stability testing of video cards. I turn the res up to the highest the monitor supports, turn FSAA and ANISO up to the max, set Q3A's max framerate to 10,000, and then set up a 0 max kill 0 time limit (neverending) botmatch in the foggy level. Ten hours later, if the card has any issues, it shows up in Q3A. Almost always, it shows up in either the decals (bulletholes and scorchmarks on the walls that go away over time) being wicked colors, or the overlay of the score being corrupt in every way imaginable. I have actually found this to find more problems then ATitool. The insane max framerate ensures a full load on a vidcard... but I have never had to test SLI so I have no idea if it would test that properly.