Installing A Memory Module - IBM 79463AU Installation And User Manual

Attention:
the server. Operating the server with the air baffle removed might damage server
components.
If you have other devices to install or remove, do so now. Otherwise, go to
"Completing the installation" on page 85.

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
DIMMs (see "System-board optional device connectors" on page 46 for the location
of the DIMM connectors):
v The server supports only industry-standard double-data-rate 3 (DDR3), 800,
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IBM System x3550 M2 Types 4198 and 7946: Installation and User's Guide
For proper cooling and airflow, replace the air baffle before you turn on
1066, or 1333 MHz, PC3-10600R-999 (single-rank or dual-rank), registered,
synchronous dynamic random-access memory (SDRAM) dual inline memory
modules (DIMMs) with error correcting code (ECC). See http://www.ibm.com/
servers/eserver/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
where:
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)
8 = x8 organization
16 = x16 organization
wwwww is the DIMM bandwidth, in MBps
6400 = 6.40 GBps (PC3-800 SDRAMs, 8-byte primary data bus)
8500 = 8.53 GBps (PC3-1066 SDRAMs, 8-byte primary data bus)
10600 = 10.66 GBps (PC3-1333 SDRAMs, 8-byte primary data bus)
12800 = 12.80 GBps PC3-1600 SDRAMs, 8-byte primary data bus)
m is the DIMM type
E = Unbuffered DIMM (UDIMM) with ECC (x72-bit module data bus)
R = Registered DIMM (RDIMM)
U = Unbuffered DIMM with no ECC (x64-bit primary data bus)
aa is the CAS latency, in clocks at maximum operating frequency
bb is the JEDEC SPD Revision Encoding and Additions level
cc is the reference design file for the design of the DIMM
d is the revision number of the reference design of the DIMM