Apple Power Macintosh 7100/80AV - Manual (Page 101)

Upgrades Power Macintosh Upgrade - 12
2 If the customer’s old
logic board had DRAM
SIMMs installed, remove
them and install them on
the upgraded logic board.
Important:
You must
install DRAM SIMMs in
matching pairs (that is,
SIMMs of the same size
and speed). The SIMMs
must be 80 ns or faster,
72-pin, noncomposite
SIMMs.
Replacement Note
: Return
all VRAM and nonmatching
DRAM SIMMs from the old
logic board to the customer.