Do you have a Blizzard or a Cyberstorm?
Yes, I bought a new DCE Cyberstorm (060@50/604@233) and it was nothing but trouble, it died about 18 months after I bought it. (After having it replaced three times under warrenty)
Last month I sent it to the Amiga Center in France and he says he has fixed it, fingers crossed it will arrive today.

When it was working I really only used it for datatype loading, playing payback and Quake and I was just starting to play around with Amp2 when it died.

I will give it a couple of months testing and then get OS4 if I think the card is going to last.