Remove a memory module

Use this information to remove a memory module.

About this task

Important

When removing/installing the memory module, do not tilt the memory module and keep it at an upright position to prevent damaging the gap pad.

Attention

• Read Installation Guidelines and Safety inspection checklist to ensure that you work safely.

• Turn off the corresponding DWC tray that you are going to perform the task on.

• Disconnect the power cords and all external cables from the enclosure.

• Use extra force to disconnect QSFP cables if they are connected to the solution.

• Make sure to remove or install memory module 20 seconds after disconnecting power cords from the system. It allows the system to be completely discharged of electricity and safe for handling memory module.

• Memory modules are sensitive to static discharge and require special handling. In addition 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 touch. 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.

• Before installing 24 Gb DRAM RDIMMs, make sure to update the UEFI firmware to the latest version first, then remove all existing 16 Gb DRAM RDIMMs.

The following illustration shows the location of the memory module connectors on the system board.

Figure 1. Memory module connector location

Note

The following illustration might differ slightly from your hardware, but the installation method is the same.

Procedure

1. Make preparations for this task.
   1. Remove the tray from the enclosure. See Remove a DWC tray from the enclosure.
   2. Remove the tray cover. See Remove the tray cover.
2. Remove the memory module tool attached to the DIMM comb.
   Figure 2. Memory module tool removal
   
   

   Note

   Memory module tool is recommended due to space limitations caused by location of water loop tubes through the memory section.
3. Remove the DIMM cover.
   Note

   Do not tilt the DIMM cover and keep it at an upright position to prevent damaging the gap pads.

   Figure 3. DIMM cover removal
   
   
4. Carefully use the memory module tool to press the retaining clips outward on each end of the memory module connector.
   Figure 4. Pressing retaining clips on memory module connector
   
   

   Attention

   • Memory modules are static-sensitive devices. The package must be grounded before it is opened.

   • To avoid breaking the retaining clips or damaging the memory module connectors, open and close the clips gently.

5. Carefully remove the memory module.
   Attention

   When removing/installing the memory module, do not tilt the memory module and keep it at an upright position to prevent damaging the gap pad.

   Figure 5. Memory module removal
   
   
6. Install the DIMM cover.
   Note

   Do not tilt the DIMM cover and keep it at an upright position to prevent damaging the gap pads.

   Figure 6. DIMM cover installation
   
   
   Note

   If the DIMM cover is attached with rubber, as type A and type B shown below, the types of DIMM cover and the installation orientation is different depending on the DIMMs to be covered. Make sure to follow the rubber-attached DIMM cover mapping illustration below.

   Figure 7. Rubber-attached DIMM cover type A and Type B
   
   

   DIMM cover type	Rubber(s) attached	Installation orientation
   A	1 and 2. 1 is thinner than 2	Rubber 1 should face the CPU when installing the DIMM cover.
   B	1

   Figure 8. Rubber-attached DIMM cover mapping

   • Area A: DIMMs to be covered by DIMM cover A

   • Area B: DIMMs to be covered by DIMM cover B

   • 1: Thinner rubber should be facing the CPU side.

   
   
   
7. Install the memory module tool to the DIMM comb on the left side of the node.
   Figure 9. Memory module tool installation