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Hardware options installation 31
o
Last: G and H
o Do not populate slots C, F, or I.
• UDIMM
o First: A and B
o Last: D and E
o Do not populate slots C, F, G, H, or I.
After installing the DIMMs, use RBSU to configure the system for Lockstep memory support ("Configuring
lockstep memory" on page 55).
Installing a DIMM
CAUTION: To avoid damage to the hard drives, memory, and other system components, the
air baffle, drive blanks, and access panel must be installed when the server is powered up.
1. Power down the server (on page 16).
2. Extend the server from the rack.
3. Remove the access panel (on page 17).
4. Remove the air baffle (on page 17).
5. Open the DIMM slot latches.
6. Install the DIMM.
7. Install the air baffle.
8. Install the access panel.
If you are installing DIMMs in mirrored or lock-step configuration, configure this mode in RBSU ("HP ROM-
Based Setup Utility" on page 53).
For more information about LEDs and troubleshooting failed DIMMs, see "System LEDs and internal health
LED combinations (on page 14)."