8500 = 8.53 GBps (PC3-1066 SDRAMs, 8-byte primary data bus)
10600 = 10.66 GBps (PC3-1333 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
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).
Unbuffered DIMMs (UDIMMs)
The following notes provide information that you must consider when installing
UDIMMs (see “System-board optional-devices connectors” on page 18 for the
location of the DIMM connectors):
v The memory channels run at the fastest common frequency of the installed
DIMMs.
v Do not use both UDIMMs and RDIMMs in the same server.
v Using ECC and non-ECC UDIMMs in the server will cause the server to run in
non-ECC mode.
v The UDIMM options that are available for the server are 1 GB, 2 GB, and 4 GB
(when available) memory DIMMs.
v You can install a maximum of 16 GB of memory in some server models when
you use UDIMMs.
v The server supports up to two single-rank or dual-rank UDIMMs per channel.
v DIMM slots 3 and 6 are not supported when you install UDIMMs in the server.
Do not install DIMMs in these connectors.
v The following table lists the DIMM support compatibility.
Table 8. Supported DIMM compatibility
DIMM configuration
Intel quad-core
(Xeon 3400 series)
Intel dual-core (Core
i3)
Intel dual-core
(Xeon L3406)
UDIMM non-ECC
only
Not supported Not supported Not supported
UDIMM ECC only Supported Supported Supported
UDIMM mix ECC with
non-ECC
Not supported Not supported Not supported
RDIMM ECC only Supported Not supported Not supported
v The following table lists the supported UDIMM population.
170 System x3200 M3 Types 7327 and 7328: Problem Determination and Service Guide
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