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Installing A Memory Module - IBM 7945G2U Installation And User Manual

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Installing a memory module

The following notes describe the types of dual inline memory modules (DIMMs) that
the server supports and other information that you must consider when you install
v When you install or remove DIMMs, the server configuration information
v The server supports only industry-standard double-data-rate 3 (DDR3), 800,
System x3650 M3 Types 4255, 7945, and 7949: Installation and User's Guide
changes. When you restart the server, the system displays a message that
indicates that the memory configuration has changed.
1066, or 1333 MHz, PC3-10600R-999, registered or unbuffered, synchronous
dynamic random-access memory (SDRAM) dual inline memory modules (DIMMs)
with error correcting code (ECC). See
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.
ggg eRxff-PC3-wwwwwm-aa-bb-cc
ggg is the total capacity of the DIMM (for example, 1GB, 2GB, or 4GB)
e is the number of ranks
1 = single-rank
2 = dual-rank
4 = quad-rank
ff is the device organization (bit width)
4 = x4 organization (4 DQ lines per SDRAM)



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