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After you install or remove a DIMM, you must change and save the new configuration information by using
the Setup utility. When you turn on the blade server, a message indicates that the memory configuration has
changed. Start the Setup utility and select Save Settings (see "Setup utility menu" on page 54 for more
information) to save changes.
The memory is accessed internally through the system using six channels. Each channel contains two DIMM
connectors. The following table lists each channel and which DIMM connectors belong to the channel.
Table 2. Memory channel configuration
Memory channel
Channel 0
Channel 1
Channel 2
Channel 3
Channel 4
Channel 5
Depending on the memory mode that is set in the Setup utility, the blade server can support a minimum of 1
GB and a maximum of 48 GB of system memory on the system board in a blade server with one processor.
If two microprocessors are installed, the blade server can support a minimum of 2 GB and a maximum of
96 GB of system memory. There are two different memory modes:
• Independent channel mode: Independent channel mode gives a maximum of 96 GB of usable memory
with one CPU installed, and 192 GB of usable memory with 2 CPUs installed (using 16 GB DIMMs). The
DIMMs can be installed without matching sizes. See the table below for the memory installation order.
Table 3. System memory configuration for independent channel mode (1 microprocessor)
Installed
memory
1
1 DIMM
2 DIMMs
3 DIMMs
4 DIMMs
X
5 DIMMs
X
6 DIMMs
X
Table 4. System memory configuration for independent channel mode (2 microprocessors)
Installed
memory
1
2 DIMMs
3 DIMMs
4 DIMMs
5 DIMMs
6 DIMMs
7 DIMMs
X
2
3
4
X
X
X
X
X
X
X
X
X
X
X
X
X
2
3
4
X
X
X
X
X
X
X
X
X
X
X
DIMM connector
DIMM connector 1 and 2
DIMM connector 5 and 6
DIMM connector 3 and 4
DIMM connector 7 and 8
DIMM connector 11 and 12
DIMM connector 9 and 10
DIMM socket
5
6
7
X
X
X
X
X
DIMM socket
5
6
7
X
X
X
8
9
10
11
8
9
10
11
X
X
X
X
X
X
X
X
X
X
.
Chapter 3
Installing options
12
12
X
X
25
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