Installing Memory Modules - IBM 8678 Installation And User Manual

Installing memory modules

You can increase the amount of memory in your blade server by installing
memory-module options. When you install memory, you must install a pair of
matched dual inline memory modules (DIMMs).
Notes:
1. The system board contains four DIMM connectors and supports two-way
2. The DIMM options available for your blade server are 256 MB, 512 MB, and
3. Your blade server comes with two 256 MB DIMMs installed in the DIMM 3 and
4. Both DIMMs in a pair must be the same size, speed, type, and technology. You
5. The second pair does not have to be DIMMs of the same size, speed, type, and
6. Install only 2.5 V, 184-pin, double-data-rate (DDR), PC2100, registered
7. PC2100 DIMMs are backward-compatible and work in the PC1600 sockets.
8. Installing or removing DIMMs changes the configuration information for the
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BladeCenter HS20 Type 8678: Installation and User's Guide
memory interleaving.
1 GB. Your blade server supports a minimum of 512 MB and a maximum of
4 GB of system memory.
DIMM 4 memory connectors (J2 and J6, respectively). When you install
additional DIMMs, be sure to install them as a pair, in DIMM connectors 1 and 2
(J1 and J5).
Install the DIMMs in the following order:
Pair
First
Second
can mix compatible DIMMs from various manufacturers.
technology as the first pair.
synchronous dynamic random-access memory (SDRAM) with error correcting
code (ECC) DIMMs. These DIMMs must be compatible with the latest PC2100
SDRAM Registered DIMM specification, which is available from
http://www.jedec.org/ on the World Wide Web. For a list of supported options for
your blade server, see http://www.ibm.com/us/compat/ on the World Wide Web.
blade server. Therefore, after installing or removing a DIMM, you must change
and save the new configuration information by using the Configuration/Setup
Utility program. When you restart the blade server, the system displays a
message indicating that the memory configuration has changed. Start the
Configuration/Setup Utility program and select Save Settings. See
"Configuration/Setup Utility menu choices" on page 40 for more information.
DIMM connectors
3 and 4 (J2, J6)
1 and 2 (J1, J5)