Lenovo thinksystem SN850 7X15, Setup Manual

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Install a DIMM
Use this information to install a DIMM.
Attention: Memory modules are sensitive to static discharge and require special handling. In addition to the
standard guidelines for “Handling static-sensitive devices” on page 28:
• Always wear an electrostatic-discharge strap when removing or installing memory modules. Electrostatic-
discharge gloves can also be used.
• Never hold two or more memory modules together so that they touch. Do not stack memory modules
directly on top of each other during storage.
• Never touch the gold memory module connector contacts or allow these contacts to touch the outside of
the memory-module connector housing.
• Handle memory modules with care: never bend, twist, or drop a memory module.
Before installing a DIMM, make sure that you understand the required installation order, depending on
whether you are implementing memory mirroring, memory rank sparing, or independent memory mode. See
ThinkSystem SN850 Compute Node Memory Population Reference for the required installation order.
If you are installing an optional processor, install it before installing DIMMs. See “Install a processor-heat-
sink module” on page 42.
Before you install a DIMM, complete the following steps:
1. Read “Installation Guidelines” on page 26 to ensure that you work safely.
2. Carefully lay the compute node on a flat, static-protective surface, orienting the compute node with the
bezel pointing toward you.
3. Remove the compute node cover (see “Remove the compute node cover” on page 29 for instructions).
To install a DIMM, complete the following steps:
Attention: Memory modules are sensitive to static discharge and require special handling. In addition to the
standard guidelines for “Handling static-sensitive devices” on page 28:
• Always wear an electrostatic-discharge strap when removing or installing memory modules. Electrostatic-
discharge gloves can also be used.
• Never hold two or more memory modules together so that they touch. Do not stack memory modules
directly on top of each other during storage.
• Never touch the gold memory module connector contacts or allow these contacts to touch the outside of
the memory-module connector housing.
• Handle memory modules with care: never bend, twist, or drop a memory module.
• Remove or install DIMMs for one processor at a time.
• Do not mix RDIMMs and LR-DIMMs in the same compute node.
• DIMMs are static-sensitive devices. The package must be grounded before it is opened.
Watch the procedure . A video of the installation process is available:
• Youtube: https://www.youtube.com/playlist?list=PLYV5R7hVcs-DtV8A4UWy7d3AoFKjCvas3
• Youku: http://list.youku.com/albumlist/show/id_50481024
Step 1. Remove the air baffle (see “Remove the air baffle” on page 30 for instructions).
Step 2. Locate the DIMM connectors (see “System-board connectors” on page 20 for instructions).
Determine which DIMM connector you want to install the DIMM.
Step 3. Touch the static-protective package that contains the DIMM to any unpainted metal surface on the
Flex System chassis or any unpainted metal surface on any other grounded rack component in the
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ThinkSystem SN850 Compute Node Setup Guide