The Matrox Triple Head is very relible,... I used ion a trade show for like 16 hours a day, for about 10 days, and only one morning I needed to restarted one time, all the rest PERFECT.

Just beware, I don't know how the computer process, but you get a output of like 2400 x 800, I had some slow downs with 2 triple heads on one G5.

Not a problem on a MacPro, 6 outputs fine...