Installing a memory module
Use these instructions to install memory modules in the blade server.
The blade server has a total of eighteen direct inline memory module (DIMM)
slots. The blade server supports very low profile (VLP) DDR3 DIMMs with error
code correction (ECC). For a current list of supported DIMMs for the blade server,
see http://www.ibm.com/servers/eserver/serverproven/compat/us/.
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 20 for
more information) to save changes.
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 144 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 288
GB of system memory.
Before you install the quad-rank DIMMs, read the following information:
v
Quad-rank DIMMs must be installed first. You can install up to two quad-rank
DIMMs per channel.
v
DIMM connectors 1, 4, 7, 10, 13, and 16 are not supported when a quad-rank
DIMM is installed. The maximum number of DIMMs supported is 12 (two
microprocessors installed).
There are three different memory modes:
v
Independent channel mode:
Independent channel mode gives a maximum of
144 GB of usable memory with one microprocessor installed, and 288 GB of
usable memory with 2 microprocessors installed (using 16 GB dual-rank
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
DIMM connector
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
1 DIMM
X
2
DIMMs
X
X
3
DIMMs
X
X
X
4
DIMMs
X
X
X
X
5
DIMMs
X
X
X
X
X
6
DIMMs
X
X
X
X
X
X
7
DIMMs
X
1
X
X
X
X
X
X
8
DIMMs
X
1
X
X
X
1
X
X
X
X
64
BladeCenter HS22V Type 7871 and 1949: Problem Determination and Service Guide
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