Lenovo ThinkServer TD200x Hardware Maintenance Manual page 209

Note: Some memory is reserved for various system resources and is unavailable to the operating system.
The amount of memory that is reserved for system resources depends on the operating system, the
configuration of the server, and the configured PCI devices.
• The maximum operating speed of the server is determined by the slowest DIMM in the server.
• The server can operate in two major modes: mirroring and independent channel modes.
The following illustration shows how to install DIMMs on the system board.
Attention: Static electricity that is released to internal server components when the server is powered on
might cause the server to stop, which might result in the loss of data. To avoid this potential problem,
always use an electrostatic-discharge wrist strap or other grounding system when you work inside the
server with the power on.
To install a DIMM, do the following:
1. Read the safety information that begins on page Safety information.
2. Turn off the server and peripheral devices; then, disconnect the power cords and all external cables.
3. Remove the left-side cover (see Removing the left-side cover).
4. Remove the hot-swap power supply or power supplies from the server.
5. Pull up the power-supply cage handle, then swing the power-supply cage out of the server (seeOpening
the power-supply cage for more information).
6. Remove the air baffle from the server (see Removing the air baffle for more information).
7. Open the retaining clip on each end of the DIMM connector.
Attention: To avoid breaking the DIMM retaining clips or damaging the DIMM connectors, open and
close the clips gently.
8. Touch the static-protective package containing the DIMM to any unpainted metal surface on the outside
of the server. Then, remove the DIMM from the package.
9. Turn the DIMM so that the DIMM keys align correctly with the connector.
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Chapter 7 Installing optional devices and replacing customer replaceable units
201