Apple PC Compatibility Card 7-inch card - Manual (Page 142)

Your PC Compatibility Card has one socket available for RAM (random
access memory). Some versions of the card come with a DIMM (dual inline
memory module) already installed. On these cards, you can increase memory
by replacing the installed DIMM with a greater-capacity DIMM.
Some versions of the PC Compatibility Card do not come with an installed
DIMM. On these cards, you must install a DIMM in the socket prior to
installing the card in your computer. Otherwise, the card will not work.
The memory you install on your PC Compatibility Card is for the exclusive use
of your PC. Generally, a larger-capacity DIMM will provide better performance
than one of lower capacity. The DIMM socket accepts an 8, 16, 32, or 64 MB
DIMM. For more information, see Appendix D, “Technical Information.”
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Appendix A
Adding Memory to a PC Compatibility Card