IBM System x3400 Type 7975, Installation Manual

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7. Touch the static-protective package that contains the DIMM to any unpainted
metal surface on the server. Then, remove the new DIMM from the package.
8. Turn the DIMM so that the DIMM keys align correctly with the slot.
9. Insert the DIMM into the connector by aligning the edges of the DIMM with the
slots at the ends of the DIMM connector. 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 firmly seated in the connector. If there is a gap between the DIMM
and the retaining clips, the DIMM has not been correctly installed. Open the
retaining clips, remove the DIMM, and then reinsert it.
DIMM 1
DIMM 2
DIMM3
DIMM4
DIMM 5
DIMM 6
DIMM 7
DIMM 8
DIMM 9
DIMM 10
DIMM11
DIMM 12
10. Rotate the power-supply cage assembly back into the server. Press the
power-supply cage release tab and rotate the power-supply cage assembly
into the chassis.
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System x3400 Types 7973, 7974, 7975, and 7976: Installation Guide