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Installing memory
The following notes describe the types of dual inline memory modules (DIMMs) that
your server supports and other information that you must consider when installing
DIMMs:
v Your xSeries 450 server supports 512 MB, 1 GB, and 2 GB DIMMs, for a
v Your server supports a maximum of only 20 DIMMs (10 per port) if any connector
v Your server comes with a minimum of two 512 MB DIMMs, installed in slots 1
v Each DIMM in a pair must be of the same size and technology to ensure that the
v When using memory mirroring, you must install two pairs of DIMMs at a time.
maximum of 40 GB of system memory. Go to the ServerProven list at
http://www.ibm.com/pc/compat/ for a list of memory modules you can use with
your server.
contains a 2 GB DIMM. Your server supports a maximum of 28 DIMMs (14 per
port) if only 512 MB and 1 GB DIMMs are installed.
and 14. When installing additional DIMMs, you must install two DIMMS at a time,
in the order shown in the following table to maintain performance.
Table 1. DIMM installation sequence
Pair
DIMM connectors (Port 1)
1
1 and 14
3
4 and 11
5
2 and 13
7
5 and 10
9
3 and 12
11
6 and 9
13
7 and 8
Port 1
server will operate properly.
The four DIMMs in each bank must be identical. The following table shows the
pairs that are in each bank. See Table 1 for the DIMM connector pair
assignments.
Pair
DIMM connectors (Port 2)
2
15 and 28
4
18 and 25
6
16 and 27
8
19 and 24
10
17 and 26
12
20 and 23
14
21 and 22
Port 2
DIMM error LEDs
are built into each handle
Chapter 2. Installing options
19
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