Memory Installation Guidelines - HP ProLiant DL145 Maintenance And Service Manual

Figure 42 DIMM slot locations

Memory installation guidelines

Observe the following important guidelines when installing memory modules:
Use only HP-supported PC2-5300 DDR2 (667 MHz) registered ECC DIMMs in 512 MB, 1 GB, or 2 GB
capacities.
The processor 2 socket (U55) must be populated before you can install memory modules in the DIMM5 to
DIMM8 slots.
If a second processor is installed, HP does not recommend leaving all processor 2 socket DIMM slots
(DIMM5 to DIMM8) empty. Populate at least the DIMM7 and DIMM8 slots when the server uses a second
processor.
Memory modules must be installed in pairs of the same size in the sequence listed below:
For the processor 1 socket DIMM slots: Populate DIMM3 and DIMM4 first, then DIMM1 and DIMM2.
For the processor 2 socket DIMM slots: Populate DIMM7 and DIMM8 first, then DIMM5 and DIMM6.
Memory modules in DIMM1 and DIMM2 should not be larger in capacity than the modules in DIMM3 and
DIMM4; similarly, the modules in DIMM5 and DIMM6 should not be larger than the modules in DIMM7
and DIMM8.
Installing a memory module
1. Perform the pre-installation procedures described on page 11.
2. If necessary, remove any accessory boards or cables that prevent access to the DIMM slots.
3. Locate an empty DIMM slot on the system board.
4. If necessary, open the holding clips of the selected DIMM slot.
Remove the memory module from its protective packaging, handling it by the edges. Do not touch any
5.
components on the module or the gold connectors on the bottom edge.
6. Install the memory module:
a. Align the notch on the bottom edge of the module with the keyed surface of the DIMM slot, and then
press the module fully into the slot.
Removal and replacement procedures 39