Lenovo x3550 M4 Installation And Service Manual page 247
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Attention: To avoid breaking the retaining clips or damaging the DIMM
connectors, open and close the clips gently.
Figure 136. DIMM removal
Results
If you are instructed to return the DIMM, follow all packaging instructions, and
use any packaging materials for shipping that are supplied to you.
Installing a memory module
The following notes describe the types of DIMMs that the server supports and
other information that you must consider when you install DIMMs.
v When you install or remove DIMMs, the server configuration information
changes. When you restart the server, the system displays a message that
indicates that the memory configuration has changed.
v The server supports only industry-standard double-data-rate 3 (DDR3), 1066,
1333, 1600, or 1866 MHz, PC3-8500, PC3-10600, PC3-12800, or PC3-14900
registered or unbuffered, synchronous dynamic random-access memory
(SDRAM) dual inline memory modules (DIMMs) with error correcting code
(ECC). See http://www.ibm.com/systems/info/x86servers/serverproven/
compat/us/ for a list of supported memory modules for the server.
– The specifications of a DDR3 DIMM are on a label on the DIMM, in the
following format.
ggggg eRxff PC3v-wwwwwm-aa-bb-ccd
where:
- ggggg is the total capacity of the DIMM (for example, 1 GB, 2 GB, or 4 GB)
- eR is the number of ranks
1R = single-rank
2R = dual-rank
4R = quad-rank
- xff is the device organization (bit width)
x4 = x4 organization (4 DQ lines per SDRAM)
x8 = x8 organization
Chapter 6. Removing and replacing components
229
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Troubleshooting
