v
In two-DIMM-per-channel configuration, a server with an Intel Xeon
™
E5-2600
series microprocessor automatically operates with a maximum memory speed of
up to 1600 MHz when the following condition is met:
– Two 1.35 V single-rank, dual-ranl, or quad-rank UDIMMs, RDIMMs or
LRDIMMs are installed in the same channel. In the Setup utility,
Memory
speed
is set to
Max performance
and
LV-DIMM power
is set to
Enhance
performance
mode. The 1.35 V UDIMMs, RDIMMs or LRDIMMs will function
at 1.5 V.
v
The server supports a maximum of 16 dual-rank UDIMMs. The server supports
up to two UDIMMs per channel.
v
The server supports a maximum of 24 single-rank, dual-rank, or 16 quad-rank
RDIMMs. The server does not support three quad-rank RDIMMs in the same
channel.
v
The following table shows an example of the maximum amount of memory that
you can install using ranked DIMMs:
Table 6. Maximum memory installation using ranked DIMMs
Number of
DIMMs
DIMM type
DIMM size
Total memory
16
Dual-rank UDIMMs
4 GB
64 GB
24
Single-rank RDIMMs
2 GB
48 GB
24
Single-rank RDIMMs
4 GB
96 GB
24
Dual-rank RDIMMs
8 GB
192 GB
24
Dual-rank RDIMMs
16 GB
384 GB
16
Quad-rank RDIMMs
16 GB
256 GB
24
Quad-rank LRDIMMs
32 GB
768 GB
v
The UDIMM option that is available for the server is 4 GB. The server supports a
minimum of 4 GB and a maximum of 64 GB of system memory using UDIMMs.
v
The RDIMM options that are available for the server are 2 GB, 4 GB, 8 GB, and
16 GB. The server supports a minimum of 2 GB and a maximum of 384 GB of
system memory using RDIMMs.
v
The LRDIMM option that is available for the server is 32 GB. The server supports
a minimum of 32 GB and a maximum of 768 GB of system memory using
LRDIMMs.
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
Chapter 3, “Configuring the server,” on page 105.
v
A minimum of one DIMM must be installed for each microprocessor. For
example, you must install a minimum of two DIMMs if the server has two
microprocessors installed. However, to improve system performance, install a
minimum of four DIMMs for each microprocessor.
v
DIMMs in the server must be the same type (RDIMM, UDIMM, or LRDIMM) to
ensure that the server will operate correctly.
v
When you install one quad-rank DIMM in a channel, install it in the DIMM
connector furthest away from the microprocessor.
Chapter 2. Installing optional devices
61
Summary of Contents for Redboks System x3550 M4
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