I have one of these. I ran it for several years in a 3/2xx under stock SunOS 4.1.1. SunView might support it, but nothing X-ish does. I used it with a hacked build of X11R6 that had been modified to treat a cgnine as a cgeight. It worked fine, but it didn't take advantage of any of the acceleration hardware on the card. --James B.