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## Install a DIMM

This is a cold-service procedure that can be performed by customers.

Note - Dual-ranked x4 (2Rx4) DIMMs require System Firmware 8.2.1.b or later. See DIMM Rank Classification Labels.

1. Consider your first steps:

   - Familiarize yourself with DIMM configuration rules.

     See DIMM Population Rules

   - Prepare the server for service.

     See Preparing for Service

   - If tyou are removing a faulty DIMM, locate the faulty DIMM.

     See Locate a Faulty DIMM (DIMM Fault Remind Button).

2. Swing the air duct up and forward to the fully open position.
3. Unpack the replacement DIMMs and place them on an antistatic mat.
4. Ensure that the ejector tabs on the connector that will receive the DIMM are in the open position.

   Figure 44 Installing DIMMs

5. Align the DIMM notch with the key in the connector.

   | Caution - Ensure that the orientation is correct. The DIMM might be damaged if the orientation is reversed.

6. Push the DIMM into the connector until the ejector tabs lock the DIMM in place.

   If the DIMM does not easily seat into the connector, check the DIMM's orientation.

7. Repeat Step 4 through Step 6 until all new DIMMs are installed.

   | Caution - Do not leave DIMM slots empty. You must install filler panels in all empty DIMM slots.

8. Return the air duct to the closed position.
9. Finish the installation procedure:

   - Return the server to operation.

     See Returning the Server to Operation.

   - Verify DIMM functionality.

     See Verify DIMM Functionality.

##### Related Information

- About DIMMs

- Remove a DIMM

- Increase System Memory With Additional DIMMs

- Verify DIMM Functionality

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