Replacing A Max5 Memory Module - IBM x3690 X5 Service Manual

Replacing a MAX5 memory module

The following notes describe the types of DIMMs that the MAX5 memory
expansion module supports and other information that you must consider when
you install DIMMs:
v The MAX5 supports a maximum of 32 DIMMs (single-rank, dual-rank, or
v The DIMM options that are available for the MAX5 are 2 GB, 4 GB, 8 GB, 16 GB,
v If you install 32 GB DIMMs in the MAX5, all of the DIMMs must be 32 GB
v The MAX5 supports a minimum of 4 GB and a maximum of 1 TB of system
v Some MAX5 models come with the Intel 7500 scalable memory buffer or the
v The MAX5 supports 1.35-volt (low-voltage) and 1.5-volt DIMMs. In addition,
v Double-device data correction support is only available when 16 GB x4 DRAM
v The MAX5 does not support memory sparing. However, the host server does
v When you populate DIMMs in the MAX5, populate the larger capacity DIMMs
v The MAX5 provides eight memory ports (memory channels) and each memory
384
System x3690 X5 Types 7147, 7148, 7149, and 7192: Problem Determination and Service Guide
quad-rank).
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).
and 32 GB (when available and depending on the model).
capacity DIMMs. You cannot mix the 32 GB DIMMs with other capacity DIMMs
in the system.
memory.
Intel 7510 scalable memory buffer. See the parts listing table under "Replaceable
MAX5 components" on page 255 for information about the Intel memory buffer
that is supported on the MAX5 system board tray.
support is dependent on the host server machine type that the MAX5 is
connected to as noted below:
– When connecting the MAX5 to IBM System x3690 X5 Machine Types 7148
and 7149:
- Install only 1.5-volt DIMMs in the MAX5.
– When connecting the MAX5 to IBM System x3690 X5 Machine Types 7147
and 7192:
- The MAX5 supports low-voltage (1.35-volt) DIMMs at capacities of 4 GB, 8
GB, 16 GB or 16 GB LP-RDIMMs, and 32 GB only.
- If you install 32 GB DIMMs in the MAX5, all of the DIMMs must be 32 GB
capacity DIMMs. You cannot mix the 32 GB DIMMs with other capacity
DIMMs in the system.
- When you mix 1.35-volt and 1.5-volt DIMMs in the MAX5, the MAX5 will
operate at the 1.5-volt rate.
- You can enable all DIMMs (1.35-volt and 1.5-volt) to operate at 1.5-volt in
the host server Setup utility.
technology DIMMs are installed in the MAX5 and the MAX5 is connected to a
host server.
support memory sparing. For more information about installing memory on the
host server and memory sparing, see "Replacing a memory module" on page
296.
first; then the smaller capacity DIMMs. See Table 26 on page 385 for
non-mirroring mode DIMM population sequence and Table 27 on page 386 for
memory-mirroring mode DIMM population sequence.
port supports up to four DIMMs. Do not mix DIMMs with x4 technology