Skip Navigation Links
Exit Print View
| SPARC T4-4 Server HTML Document Collection

Search Scope:

- This Document
- Entire Library

## Increase Memory With Additional DIMMs (16-Gbyte Configurations)

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

The following 16-Gbyte configurations are supported in each processor:

DIMM Rank Classification | Half-populated Configuration (512 GB) | Fully-populated Configuration (1024 GB)
--- | --- | ---
All 4Rx4 DIMMs | eight 4Rx4 DIMMs in `PMx/CMP0` eight 4Rx4 DIMMs in `PMx/CMP1` | 16 4Rx4 DIMMs in `PMx/CMP0` 16 4Rx4 DIMMs in `PMx/CMP1`
All 2Rx4 DIMMs1 | eight 2Rx4 DIMMs in `PMx/CMP0` eight 2Rx4 DIMMs in `PMx/CMP1` | 16 2Rx4 DIMMs in `PMx/CMP0` 16 2Rx4 DIMMs in `PMx/CMP1`
4Rx4 DIMMs and 2Rx4 DIMMs (hybrid configurations)* | Not supported. | 16 4Rx4 DIMMs in `PMx/CMP0` 16 2Rx4 DIMMs in `PMx/CMP1`
| Not supported. | 16 2Rx4 DIMMs in `PMx/CMP0` 16 4Rx4 DIMMs in `PMx/CMP1`

1Requires System Firmware 8.2.1.b at minimum.

When upgrading a server half-populated with 16-Gbyte DIMMs, you can install DIMMs of two different architectures on the same processor module (PM) in a hybrid configuration. For example:

- All 2Rx4 DIMMs in PM0/CMP0.

- All 4Rx4 DIMMs in PM0/CMP1.

Note - Quad-ranked x4 DIMMs require System Firmware 8.2.1.b at minimum. See DIMM Rank Classification.

To install 16-Gbyte DIMMs in a hybrid configuration, do the following on each PM being upgraded:

1. Consider your first steps:

   - Familiarize yourself with DIMM configuration rules.

     See DIMM Population Rules (Except 1536-Gbyte Configurations)

   - Prepare the system for service.

     See Preparing for Service.

   - Remove the processor module. Place the processor module on an ESD-protected work surface. Remove the processor module cover.

     See Servicing Processor Modules.

2. Note the DIMM classification labels on the DIMMs currently installed on the processor module being upgraded.

   See DIMM Rank Classification.

   Note - The DIMM classification labels are visible with the DIMMs installed in the processor module.

3. Note the DIMM classification labels provided in the upgrade kit.

   See DIMM Rank Classification.

4. Remove all DIMM filler panels from the processor module:
   1. At a DIMM slot that is to be upgraded, open the ejector tabs and remove the filler panel.
   2. Repeat Step a until all DIMM filler panels are removed.

   Note - Do not dispose of the filler panels. You may want to reuse them if any DIMMs are removed at another time.

5. Do one of the following:
   - If your upgrade DIMMs have the same rank classification as the installed DIMMs, install the upgrade DIMMs in all empty slots on the processor module.

     See Install a DIMM.

   - If your upgrade DIMMs have a different rank classification from the installed DIMMs:
     1. Remove all DIMMs currently installed on the processor module associated with CMP0 (that is, all DIMMs at `PMx/CMP0`).

        See Remove a DIMM.

     2. Install the DIMMs you removed in Step a into the empty slots on the memory risers associated with CMP1 (that is, all empty slots at `PMx/CMP1`).

        See Install a DIMM.

     3. Install all of the DIMMs in the upgrade kit into all slots on the processor module associated with CMP0 (all slots at `PMx/CMP0`).

        See Install a DIMM.

        Figure 19 Upgrading 16-Gbyte DIMMs

        Figure Legend

        1 Remove all DIMM filler panels.

        2 Remove DIMMs from CMP1.

        3 Install DIMMs previously installed on CMP1 into empty slots on CMP0.

        4 Install new DIMMs into all slots on CMP1.

6. Install the processor module in the server.

   See Servicing Processor Modules

7. Repeat Step 1 through Step 6 for the other processor module.
8. Finish the installation procedure.

   See:

   - Return the server to operation.

     See Returning the Server to Operation.

   - Verify DIMM functionality.

     See Verify DIMM Functionality.

##### Related Information

- DIMM Population Rules (Except 1536-Gbyte Configurations)

- Half-Populated Processor Module

- Fully-Populated Processor Module (Except 1536 Gbyte Configurations)

- DIMM Rank Classification

- Increase Memory With Additional DIMMs

- Verify DIMM Functionality

- Understanding DIMM Configuration Error Messages

Copyright © 2011, 2014, Oracle and/or its affiliates. All rights reserved. Legal Notices |