Replacing system DIMMs

Replacing a system DIMM involves identifying the target DIMM through the associated error message, locating the target DIMM using the FRU map on the air duct or the lit LED on the motherboard, and then replacing the DIMM.

About this task

You can use the following animation or the written steps to replace a system DIMM.

Note: The animation shows empty slots for sockets without DIMMs. These empty sockets are populated with blanks.

The number and location of DIMMS in your system depends on the model of your system. Refer to FRU map on the air duct for more information.
  • If you have a FAS8300 system, the system DIMMs are located in sockets 2, 4, 13, and 15.
  • If you have a FAS8700 system, the system DIMMs are located in slots 2, 4, 7, 9, 13, 15, 18, and 20.
  • The NVDIMM is located in slot 11.


  1. Open the air duct:
    1. Press the locking tabs on the sides of the air duct in toward the middle of the controller module.
    2. Slide the air duct toward the back of the controller module, and then rotate it upward to its completely open position.
  2. Locate the DIMMs on your controller module.
  3. Note the orientation of the DIMM in the socket so that you can insert the replacement DIMM in the proper orientation.
  4. Eject the DIMM from its socket by slowly pushing apart the two DIMM ejector tabs on either side of the DIMM, and then slide the DIMM out of the socket.
    Attention: Carefully hold the DIMM by the edges to avoid pressure on the components on the DIMM circuit board.
  5. Remove the replacement DIMM from the antistatic shipping bag, hold the DIMM by the corners, and align it to the slot.
    The notch among the pins on the DIMM should line up with the tab in the socket.
  6. Make sure that the DIMM ejector tabs on the connector are in the open position, and then insert the DIMM squarely into the slot.
    The DIMM fits tightly in the slot, but should go in easily. If not, realign the DIMM with the slot and reinsert it.
    Attention: Visually inspect the DIMM to verify that it is evenly aligned and fully inserted into the slot.
  7. Push carefully, but firmly, on the top edge of the DIMM until the ejector tabs snap into place over the notches at the ends of the DIMM.
  8. Close the air duct.