Installing A Memory Module - IBM System x3300 M4 Installation And Service Manual

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 internal connectors" on page 29 for the location
of the DIMM connectors):
v Confirm that the server supports the DIMM that you are installing, see
v The server supports only industry-standard double-data-rate 3 (DDR3), 1066
v Do not install registered and unbuffered DIMMs in the same server.
v The server supports 1.35-volt (low-voltage) and 1.5-volt DIMMs. Do not install a
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System x3300 M4 Type 7382: Installation and Service Guide
http://www.ibm.com/systems/info/x86servers/serverproven/compat/us/.
MHz PC3-8500, 1333 MHz PC3-10600, or 1600 MHz PC3-12800, (single-rank,
dual-rank, or quad-rank in specified models), registered or unbuffered,
synchronous dynamic random-access memory (SDRAM) dual inline memory
modules (DIMMs) with error correcting code (ECC).
– 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, 1GB, 2GB, or 4GB)
- eR is the number of ranks
1R = single-rank
2R = dual-rank
4R = quad-rank
- x ff is the device organization or bit width (for example, x4, x8, or x16)
4 = x4 organization (4 DQ lines per SDRAM)
8 = x8 organization
16 = x16 organization
- wwwww is the DIMM bandwidth, in MBps
8500 = 8.53 GBps (DDR3-1066 SDRAMs, 8-byte primary data bus)
10600 = 10.66 GBps (DDR3-1333 SDRAMs, 8-byte primary data bus)
12800 = 12.80 GBps (DDR3-1600 SDRAMs, 8-byte primary data bus)
14900 = 14.93 GBps (DDR3-1866 SDRAMs, 8 byte primary data bus)
17000 = 17.06 GBps (DDR3-2133 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 DDR3 SDRAM 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
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).
1.35-volt and 1.5-volt DIMM in the same server.