Well, according to Neal at Sonnet Customer Support, the PPCG4-800-1-801 card is not machine specific so it may well work just fine moved from a Tsunami MB to a Kansas MB. I have two 8600's, one is definitely a Kansas MB, the other a Tsunami MB (currently with a G3-270 card) so if the 9500 is really beyond life support I'll try the G4 card in one of them. The 8600/300 has a 604ev processor so it would be kind of nice to keep it in the classic configuration; besides, there's a spare 604ev/300 card sitting around here to be put to use someday.

Anyway, off to try different Ram configs/different MB in the 9500.