B-1

Memory Configurations
Memory DIMM Configurations
The memory board contains sixteen 168-pin DIMM
sockets for a total of up to 4 GB of system memory,
using 256MB DIMMs. See Figure B-1. D IMM soc kets on
the board are organized as four 72-bit wide , 2-, or 4-
way interleaved banks. For example, a 4-w ay
interleaved bank requires four DIMMs. DIMM sockets
accept 168-pin single- or double-sided DIMM s. A bank
must be populated using identical DIMMs. DIM Ms may
vary in size from one bank to the other, bu t all DIMMs
must be the same speed. Timing requires 60 ns fast
page devices.
A memory DIMM upgrade kit consists of 2 or 4
identical (of the same size and type) DIMMs define d as:
■ 2 x 32MB DIMMs = 64MB
■ 4 x 32MB DIMMs = 128MB
■ 4 x 64MB DIMMs = 256MB
■ 4 x 128MB DIMMs = 512MB
■ 4 x 256MB DIMMs = 1GB.
The 2 x 32MB DIMMs upgrade kit is used only for
servers that were originally shipped w ith 64MB (two
32MB DIMMs) of memory.
Figure B-1. System Board DIMM Sockets
P11
P12
P13
P14
P15
P16
P17
P18
P3
P4
P5
P6
P7
P8
P9
P10
Bank 0
Bank 1
Bank 2
Bank 3
The following table describes memory re quirements an d
characteristics: