Install a memory module

Use this information to install a memory module. This section applies to both RDIMMs and 3DS RDIMMs.

About this task

Attention:
  • Read the Installation guidelines to ensure that you work safely.
  • Memory modules are sensitive to static discharge and require special handling. Refer to the standard guidelines for Handling static-sensitive devices.
    • Always wear an electrostatic-discharge strap when removing or installing memory modules. Electrostatic-discharge gloves can also be used.

    • Never hold two or more memory modules together so that they do not touch each other. Do not stack memory modules directly on top of each other during storage.

    • Never touch the gold memory module connector contacts or allow these contacts to touch the outside of the memory module connector housing.

    • Handle memory modules with care: never bend, twist, or drop a memory module.

    • Do not use any metal tools (such as jigs or clamps) to handle the memory modules, because the rigid metals may damage the memory modules.

    • Do not insert memory modules while holding packages or passive components, which can cause package cracks or detachment of passive components by the high insertion force.

The following illustration shows the location of the DIMM connectors on the system board.
Figure 1. The location of the DIMM connectors on the system board
The location of the DIMM connectors on the system board
Watch the procedure. A video of the installation process is available:

Procedure

Important: Before installing a DIMM, make sure that you understand the required installation order, depending on whether you are implementing memory mirroring or independent memory mode. For the required installation order, see Independent memory mode: Installation guidelines and sequence and Memory mirroring mode: Installation guidelines and sequence.

  1. Determine which DIMM you want to install in the compute node and locate its corresponding connector on the system board.
  2. Open the retaining clips on each end of the DIMM connector. If necessary, you can use a pointed tool to open the retaining clips due to space constraints. Pencils are not recommended as a tool as they may not be strong enough.
    1. Place the tip of the tool in the recess on the top of the retaining clip.
    2. Carefully rotate the retaining clip away from the DIMM connector.
      Attention: To avoid breaking the retaining clips or damaging the DIMM connectors, open and close the retaining clips gently.
    Figure 2. Opening retaining clips
    Opening retaining clips
  3. Touch the static-protective package that contains the DIMM to any unpainted surface on the outside of the compute node. Then, remove the DIMM from the package and place it on a static-protective surface.
  4. Install the DIMM.
    1. Make sure that the retaining clips are in the fully open position.
    2. Align the DIMM with its connector and gently place the DIMM on the connector with both hands.
    3. Firmly press both ends of the DIMM straight down into the connector until the retaining clips snap into the locked position.
    Figure 3. DIMM installation
    DIMM installation
    Note: If there is a gap between the DIMM and the retaining clips, the DIMM has not been correctly inserted. In this case, open the retaining clips, remove the DIMM, and then reinsert it.

After you finish

  1. Reinstall the node air baffles (see Install the front air baffle and Install the middle air baffle).
  2. Reinstall the compute node into the enclosure (see Install a compute node in the enclosure).

  3. Check the power LED on each node to make sure it changes from fast blink to slow blink to indicate the node is ready to be powered on.