Dimm Installation Rules - Lenovo ThinkSystem ST550 7X09 Maintenance Manual

– Always wear an electrostatic-discharge strap when removing or installing DIMMs. Electrostatic-
discharge gloves can also be used.
– Never hold two or more DIMMs together so that they touch. Do not stack DIMMs directly on top of
each other during storage.
– Never touch the gold DIMM connector contacts or allow these contacts to touch the outside of the
DIMM connector housing.
– Handle DIMMs with care: never bend, twist, or drop a DIMM.
Before removing a DIMM:
1. If the server is installed in a rack, extend the server from the rack.
2. Remove the server cover. See "Remove the server cover" on page 68.
3. Remove the air baffle. See "Remove the air baffle" on page 72.
To remove a DIMM, complete the following steps:
Watch the procedure. A video of the removal process is available:
• Youtube: https://www.youtube.com/playlist?list=PLYV5R7hVcs-Acsjj4tU79GzKnWG316BYn
• Youku:
http://list.youku.com/albumlist/show/id_50483452
Figure 83. DIMM removal
Step 1. Carefully open the retaining clips on each end of the DIMM slot.
Attention: To avoid breaking the retaining clips or damaging the DIMM slots, handle the clips
gently.
Step 2. Remove the DIMM.
If you are instructed to return the old DIMM, follow all packaging instructions and use any packaging
materials that are provided.

DIMM installation rules

DIMMs must be installed in a specific order based on the memory configuration that you implement on your
server.
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ThinkSystem ST550 Maintenance Manual