Installing, Removing, Or Replacing Optional Hardware Devices; Installing Or Removing A Memory Module - Lenovo ThinkServer RD240 Hardware Maintenance Manual

To reinstall the server cover, see "Installing the server cover" on page 86.

Installing, removing, or replacing optional hardware devices

This section provides instructions on how to install, remove, or replace optional hardware devices for your
server. You can expand the capabilities of your server by adding memory modules, PCI cards, or drives,
and maintain your server by replacing the failing optional hardware devices. If you are replacing an optional
hardware device, perform the removal procedure and then perform the installation procedure for the optional
hardware device you want to replace.

Installing or removing a memory module

This section provides instructions on how to install or remove a memory module. For a list of the supported
memory modules for your server, go to
http://www.lenovo.com/thinkserver. On the ThinkServer systems page, click Products ® Options ®
ThinkServer Memory.
Memory module installation rules
Your server has eight memory slots for installing or replacing DDR3 SDRAM DIMMs that provide up to a
maximum of 64 GB of system memory.
The following tables provide information about the memory module installation rules that you should
consider when installing a memory module. The "X" mark indicates the suggested memory slot(s) into
which the memory module(s) should be installed in different situations. The number, for example 1, 2, or 3,
indicates the installation sequence. See "Locating parts on the system board" on page 28 to identify the
various memory slots.
Note: All memory module types and capacities must be consistent.
Table 7. DIMM installation rules when a single microprocessor (CPU0) is installed
DIMM slot
CPU0 DIMM CHA1
CPU0 DIMM CHA0
CPU0 DIMM CHB0
CPU0 DIMM CHC0
Note: Installing DIMMs on channel A and channel B of CPU0 should enable Channel Mirroring Mode. This mode
requires that you install the DIMMs in pair, and the DIMM installation for Channel Mirroring Mode is one DIMM on
CPU0 DIMM CHA0 and one DIMM on CPU0 DIMM CHB0 when a single microprocessor (CPU0) is installed.
Table 8. DIMM installation rules when two microprocessors (CPU0 and CPU1) are installed
DIMM slot
CPU0 DIMM CHA1
CPU0 DIMM CHA0
CPU0 DIMM CHB0
CPU0 DIMM CHC0
CPU1 DIMM CHA1
CPU1 DIMM CHA0
CPU1 DIMM CHB0
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ThinkServer RD240 Hardware Maintenance Manual
One DIMM Two DIMMs
X
Two DIMMs Four DIMMs
X, 1
X, 2
Three DIMMs
X, 1 X, 1
X, 2 X, 2
X, 3
Six DIMMs
X, 1 X, 1
X, 3 X, 3
X, 5
X, 2 X, 2
X, 4 X, 4
Four DIMMs
X, 4
X, 1
X, 2
X, 3
Eight DIMMs
X, 7
X, 1
X, 3
X, 5
X, 8
X, 2
X, 4