There are no drivers yet so I do not believe the backside cache of my card is working. (At least I did not remove the motherboard cache.) The USB card is recognized but I have not had time to see if it works but Apple System Profile sees it. There is a copy of X running where I work as well on a G4 400 and I would say the performance is just slightly slower than that but, not by much. Not too shabby for a machine that they said would not work.
