Yes, I agree with you Thorham and extralife, thanks!
conclusion: it is possible to make better gfx and (special to me) cheap soundcards with better accuracy and sound. The sound of my Amiga is more powerfull than the ac-xx (motherboard) I have with 686. But I tried a terratec some years ago... as crap as ac, then awe 64... a little better but bad hardware EQ... I have friends with some expensive soundcards like guilmot, etc but they sound all the same rubbish electronic 80's speakers, not to talk about the drivers that are made in a rush.