IBM System x3530 M4 Installation And Service Manual page 51

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).
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
1.35-volt and 1.5-volt DIMM in the same server.
v The server supports a maximum of 12 DIMMs (single-rank, dual-rank, or
quad-rank) on the system board. If you mix single-rank, dual-rank, or quad-rank
DIMMs in the server, quad-rank DIMMs must be installed first. When one
quad-rank DIMM is installed, it must be installed in DIMM slot 1.
v The DIMM options that are available for the server are 2 GB, 4 GB, 8 GB, 16 GB,
and 32 GB (when available).
v The server system board supports a minimum of 2 GB and a maximum of 96 GB
of system memory.
Note: The amount of usable memory is reduced depending on the system
configuration. A certain amount of memory must be reserved for system
resources. To view the total amount of installed memory and the amount of
configured memory, run the Setup utility. For additional information, see
"Configuring the server" on page 72.
v The server system board provides three memory channels for each
microprocessor and each memory channel supports up to two DIMMs. The
following table lists the DIMM connectors on each memory channel:
Table 3. DIMM connectors on each memory channel
Microprocessor Channel 0
Microprocessor 1 DIMM connectors 1
and 2
Microprocessor 2 DIMM connectors 7
and 8
v The following table shows the DIMM connectors that are associated with each
microprocessor:
Channel 1 Channel 2
DIMM connectors 3 DIMM connectors 5
and 4 and 6
DIMM connectors 9 DIMM connectors 11
and 10 and 12
Chapter 2. Installing optional devices
35