EDIT:
There were some re-marked CMI 8338/8378 soundcards. I know, I had a so-called Yamaha 724 which was in fact a CMI 8338.
As a clue, CMI soundchips do not need a crystal oscillator, they use the bus frequency. They do not have a separate D/A convertor either.
So, if the card does not have an crystal oscillator and a codec, it means is a re-marked CMI.