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HP Z400 Workstation - Memory

This section presents memory module (DIMM) configuration information and removal/installation procedures.
DIMM installation guidelines
  • Install only HP-approved unbuffered DDR3 DIMMs. See http://www.hp.com/go/quickspecs to find which DIMMs are compatible with the workstation
      caution:
    HP ships only DIMMs that are electrically and thermally compatible with this workstation. Because third-party DIMMs might not be electrically or thermally compatible, they are not supported by HP.
DIMM installation order
Review the following figures to determine the correct installation order for DIMMs.
Figure :
Figure :
Supported DIMM configurations
The workstation supports these DIMM arrangements, depending on which Z400 product you order:
  • Up to six DIMM slots
  • Memory range from 1 GB to 16GB for the 4-DIMM product
  • Memory range from 1 GB to 24GB for the 6-DIMM product
  • No support for mirroring
  • No support for DIMM sparing
BIOS errors and warnings
The BIOS generates warnings/errors on invalid memory configurations:
  • If the BIOS can find a valid memory configuration by disabling plugged-in memory, it does so and reports a warning during POST. the workstation can still be started. The warning will indicate the location of the failed DIMM on the system board or memory riser.
  • If there is no way for the BIOS to obtain a valid memory configuration by disabling plugged-in memory, the BIOS halts with a diagnostics 2006 code for memory error (five beeps and blinks).
Removing a DIMM
To remove a DIMM:
  1. Power down the workstation (see Predisassembly procedures).
  2. Disconnect power from the workstation (see Predisassembly procedures).
      caution:
    To prevent electrical damage to the DIMMs during removal or installation, power off the workstation and unplug the power cord from the AC power outlet. Otherwise, the workstation may not recognize the memory changes.
  3. Remove the side access panel (see Removing the side access panel).
  4. If your system has an airflow guide, remove it (see Removing the airflow guide).
  5. Push gently outward on the DIMM socket levers as shown in the following figure.
    Figure :
  6. Lift the DIMM straight up and out of the socket, then store the DIMM in an antistatic bag.
Installing a DIMM
To install the DIMM:
  1. Power down the workstation (see Predisassembly procedures).
  2. Disconnect power from the workstation (see Predisassembly procedures).
      caution:
    To prevent electrical damage to the DIMMs during removal or installation, power off the workstation and unplug the power cord from the AC power outlet. Otherwise, the workstation may not recognize the memory changes.
  3. Remove the side access panel (see Removing the side access panel).
  4. If your system has an airflow guide, remove it (see Removing the airflow guide).
  5. Push gently outward on the DIMM socket levers as shown in the following figure.
    Figure :
  6. Align the DIMM connector key with the DIMM socket key, and then seat the DIMM firmly in the socket as shown in the following figure.
      caution:
    DIMMs and their sockets are keyed for proper installation. To prevent socket or DIMM damage, align these guides properly when installing DIMMs.
    Figure :
  7. Secure the socket levers .
  8. For a 6-DIMM workstation configuration, replace the airflow guide (see Installing the airflow guide).
  9. Replace all components that you removed in preparation for component installation.

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