Specifications

Memory WorkGroup Servers - 12
DIMMs
Whereas SIMMs have 72-pins, DIMMs have
168 pins. The extra pins provide a 64-bit
data path, compared to a 32-bit data path for
SIMMs. In addition, DIMMs do not have to be
installed in pairs like the SIMMs on earlier
Macintosh models. (However, to take
advantage of memory interleaving, the DIMMs
should be installed in paired slots. See
“DIMMs” in Miscellaneous for more
information.)
Memory Configurations
The WS 9650 logic boards have 12 DRAM
DIMM slots, each with a 64-bit data bus.
You can increase the computer’s DRAM to
768 MB using 5-volt, 64-bit-wide, 168-
pin fast-paged mode or EDO DIMMs.
When installing DRAM DIMMs in the WS
9650, fill slot A6 first, followed by B6,
then A5, followed by B5, and so on. DRAM
DIMMs can be installed individually;
however, to take advantage of memory
interleaving (see Note below), which
provides maximum performance, you must
install the DIMMs in matching pairs and in
paired slots (A6 and B6 first, then A5 and
B5, and so on).