IBM System x3800 Type 8865 User Manual page 56

10. Open the memory card retention levers on the top of the memory card.
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IBM System x3800 Type 8865: User's Guide
5. Touch the static-protective package that contains the DIMM to any unpainted
metal surface on the outside of the server; then, remove the DIMM from the
package.
6. Turn the DIMM so that the DIMM keys align correctly with the slot.
DIMM
7. Insert the DIMM into the connector by aligning the edges of the DIMM with the
slots at the ends of the DIMM connector.
8. Firmly press the DIMM straight down into the connector by applying pressure
on both ends of the DIMM simultaneously. The retaining clips snap into the
locked position when the DIMM is seated in the connector. If there is a gap
between the DIMM and the retaining clips, the DIMM has not been correctly
inserted; open the retaining clips, remove the DIMM, and then reinsert it.
9. Repeat steps 4 through 8 to install any remaining DIMMs on the memory card.
Memory card
retention levers
Retaining
clip