Lenovo ThinkServer 6531, Hardware Maintenance Manual

Page: 130 / 244

Replacing a memory module (DIMM)
To replace a dual inline memory module (DIMM), use the following information and procedures:
Supported memory types
Following is information that describes 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 internal connectors” on page 107 for the location of the DIMM connectors).
v The server supports only industry-standard double-data-rate 3 (DDR3), 1066 or 1333 MHz, PC3-6400,
PC3-8500, or PC3-10600 (single-rank, dual-rank, or quad-rank), registered or unbuffered, synchronous
dynamic random-access memory (SDRAM) dual inline memory modules (DIMMs) with error
correcting code (ECC). See http://www.lenovo.com/thinkserver 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 e Rx ff -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
v
The server supports unbuffered DIMMs (UDIMM) or registered DIMMs (RDIMM).
v The server supports a maximum of six single-rank or dual-rank DIMMs, depending on the type of
DIMM you install in the server.
Note:
To determine the type of a DIMM, see the label on the DIMM. The information on the label is in
the format xxxxx nRxxx PC3-xxxxx-xx-xx-xxx. The numeral in the sixth numerical position indicates
whether the DIMM is single-rank (n=1) or dual-rank (n=2).
v
The server supports up to two UDIMMs or three RDIMMs per channel. The following table shows an
example of the maximum amount of memory that you can install, using ranked DIMMs.
122
ThinkServer ThinkServer RS210, Types 6531, 6532, 6533, and 6534: Hardware Maintenance Manual