Memory Module Installation - Lenovo System x3250 M4 Installation And Service Manual

Step 2. Remove the air baffle if installed (see "Removing the air baffle" on page 135).
Step 3. Carefully open the retaining clips on each end of the DIMM connector and remove the DIMM.
Attention: To avoid breaking the retaining clips or damaging the DIMM connectors, handle the
clips gently.
If you are instructed to return the server component or optional device, follow all packaging instructions,
and use any packaging materials for shipping that are supplied to you.

Memory module installation

The following notes describe the types of DIMMs that the server supports and other information that you
must consider when you install DIMMs.
• Confirm that the server supports the DIMM that you are installing (see http://www.lenovo.com/
serverproven/).
• 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. You
can use the Setup utility to view the server configuration information, see "Using the Setup utility" on
page 64 for more information.
• The server supports only industry-standard double-data-rate 3 (DDR3), 1333 or 1600 MHz, PC3L-12800
(single-rank or dual-rank), unbuffered or synchronous dynamic random-access memory (SDRAM) dual
inline memory modules (DIMMs) with error correcting code (ECC).
• The server supports a maximum of four single-rank or dual-rank unbuffered DIMMs.
• The maximum operating speed of the server is determined by the slowest DIMM in the server.
• If you install a pair of DIMMs in DIMM connectors 1 and 3, the size and speed of the DIMMs that you
install in DIMM connectors 1 and 3 must match each other. However, they do not have to be the same
size and speed as the DIMMs that are installed in DIMM connectors 2 and 4.
• You can use compatible DIMMs from various manufacturers in the same pair.
• The specifications of a DDR3 DIMM are on a label on the DIMM, in the following format.
gGBeRxf PC3v-wwwwwm-aa-bb-cc
where:
– gGB is the total capacity of the DIMM (for example, 1GB, 2GB, or 4GB)
.
Chapter 6 Removing and replacing components
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