IBM System x3550 M3 - DIMM Capacity and Speed Limits; Memory Protection Technologies

IBM System x3550 M3 14
Intel Xeon 5600 series processors:

1333 MHz when one or two single-rank or dual-rank RDIMMs per channel are installed or one

UDIMM per channel is installed
1066 MHz when one quad-rank RDIMM per channel is installed or two UDIMMs per channel are

installed
800 MHz when three single-rank or dual-rank RDIMMs or two quad-rank RDIMMs per channel are

installed
Quad-core Intel Xeon 5500 series processors:

1333 MHz when one single-rank or dual-rank RDIMM per channel is installed or one UDIMM per

channel is installed
1066 MHz when two single-rank or dual-rank RDIMMs per channel are installed, or one

quad-rank RDIMM per channel is installed, or two UDIMMs per channel are installed
800 MHz when three single-rank or dual-rank RDIMMs or two quad-rank RDIMMs per channel are

installed
Dual-core Intel Xeon 5500 series processors only support memory speed at 800 MHz.

The server supports both 1.5 V and 1.35 V DIMMs. Mixing 1.5 V and 1.35 V DIMMs in the same server is
supported for Intel Xeon 5600 series processor-based systems, in such a case all DIMMs operate at 1.5
V. Intel Xeon 5500 series processor-based systems do not support 1.35 V DIMMs.
The following memory protection technologies are supported:
ECC

ChipKill (for x4-based RDIMMs)

Memory Mirroring

Memory Sparing

If memory mirroring is used then DIMMs must be installed in pairs (minimum of one pair per CPU), and
both DIMMs in a pair must be identical in type and size. If memory sparing is used then DIMMs must be
installed in sets of three, and all DIMMs in the same set must be identical in type and size. Memory
sparing is only supported in systems with Intel Xeon 5600 series processors installed.
The following table lists memory options available for x3550 M3 server.
Table 5. Memory options (Part 1)
Part
number
Feature
code
Description Maximum
supported*
Models where
used
UDIMMs
44T1569 1914 2GB (1x2GB, 2Rx8, 1.5V) PC3-10600 ECC DDR3
1333Mhz LP UDIMM
12 -
49Y1403 A0QS 2GB (1x2GB, 1Rx8, 1.35V) PC3L-10600 ECC DDR3
1333MHz LP UDIMM
12 -
49Y1404 8648 4GB (1x4GB, 2Rx8, 1.35V) PC3L-10600 CL9 ECC
DDR3 1333MHz LP UDIMM
12 -