Apple Performa 6400/180 - Manual (Page 35)

Basics Peripheral Component Interconnect (PCI) Technology - 33
Note:
PCI expansion slots are compatible with all PCI 2.0
specification-compliant cards with the addition of
Macintosh-OS-specific software driver. Nubus cards
cannot
be used in this expansion slot. PDS cards for the Macintosh
LC family, the Macintosh Quadra 630 computer, or cards
that operate in the I/O expansion slot in Power Macintosh
5200 and 6200 computers are
not
compatible with the PCI
expansion slots.