Installing Additional Memory - IBM LS21 - BladeCenter - 7971 Installation And User Manual

Installing additional memory

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BladeCenter LS21 Type 7971 and LS41 Type 7972: Installation and User's Guide
The following notes describe the types of dual inline memory modules (DIMMs) that
the blade server supports and other information that you must consider when
installing DIMMs:
v The blade server system board contains eight DIMM connectors (4 DIMM
connectors per processor). If an MPE is installed, there are also eight DIMM
connectors (4 DIMM connectors per processor) on the MPE system board.
v The system supports Error Correction Code (ECC) protected, industry-standard
240-pin, 72-bit technology Very Low Profile (VLP) Double Data Rate
Synchronous DRAM Dual In-Line Memory Modules (DDR-2 SDRAM DIMMs)
v The server supports two-way memory interleaving.
v Depending on the memory configuration set in blade server BIOS, the blade
server can support a minimum of 1 GB and a maximum of 32 GB of system
memory for single-width blade servers or a maximum of 64 GB of system
memory for blade servers with an MPE installed.
v The DIMM options that are available for the blade server are 512 MB, 1 GB, 2
GB, and 4 GB.
v All DIMMs must be installed in pairs of the same size, speed, type, technology,
and physical design. You can mix compatible DIMMs from different
manufacturers.
v If you wish to take advantage of Chipkill memory, each DIMM installed in your
blade server must support the Chipkill technology.
v For a current list of supported DIMMs for the blade server, go to
http://www.ibm.com/servers/eserver/serverproven/compat/us/.
v For each installed microprocessor, a set of 4 DIMM sockets is enabled (see the
following table for more information).