Fujitsu PRIMERGY RX2540 M7 Upgrade And Maintenance Manual page 342

Main memory
Installing a memory module
Figure 204: Opening the securing clips
▶ Press the securing clips on both sides of the memory slot concerned
outward.
▶ If applicable, remove the dummy module.
Figure 205: Installing a memory module
▶ Align the notch (A) on the bottom of the module with the crossbar in the slot.
▶ Press down on the memory module (1) until the securing clips snap into the
cutouts at each end of the module (2).
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Upgrade and Maintenance Manual RX2540 M7