HP P5389A - Intel Pentium III-S 1.4 GHz Processor Upgrade Maintenance Manual page 31

Chapter 3 Installing and Configuring
Figure 3-13. DIMM Locations on System Board
5. Spread the two retaining latches outward to accept the DIMM.
6. Remove the HP DIMM from its protective container, handling the module by its edges.
If you must lay it down, place it on an anti-static mat.
7. Align the notches on the new DIMM with the keys on the DIMM slot. See Figure 3-14.
Figure 3-14. DIMM to Slot Alignment
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