B-1

Memory Configurations

Memory DIMM Configurations
The processor/memory board has e ight 168-pin DIMM
sockets for a total of up to 1GB of system memory,
using 128MB DIMMs. See Figure B-1.
The sockets are arranged in a bank that su pports a 64-
bit wide data path with 8 parity bits. Timing requir es
60 ns devices. Parity generation/checking is provided
for each byte. Separate banks of DIMM s may have
different sizes of memory installed.
A DIMM bank consists of a single 72-pin 60 ns device
with gold plated edge connectors as follows:
■ 4M x 72 DIMM = 32MB
■ 8M x 72 DIMM = 64MB
■ 16M x 72 DIMM = 128MB.
A DIMM should be installed in the first (M1) sock et.
Otherwise, you can add any size DIMM in any socket.
Table B-1 lists the distribution of DIMMs for syste m
memory configurations.
Figure B-1. System Board DIMM Sockets