Lenovo System x3750 M4, Installation And Service Manual

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• When one microprocessor is installed, the microprocessor air baffle, the DIMM air baffle, or the
microprocessor and memory expansion tray must be installed to provide proper system cooling.
• When you install an additional microprocessor, you must also install additional memory. See
“Non-mirroring (independent mode)” on page 48, “Memory mirroring” on page 49, and “Memory sparing”
on page 50 for details about DIMM installation sequence.
• To ensure proper server operation when you install an additional microprocessor, use microprocessors
that have the same QuickPath Interconnect (QPI) link speed, integrated memory controller frequency, core
frequency, power segment, internal cache size, and type.
• Installing microprocessors of different stepping levels within the same server is supported.
• When you install microprocessors with different stepping levels within the same server, you do not have to
install the microprocessor with the lowest stepping level and features in microprocessor socket 1.
• The components in the server dictate the number of microprocessors that you must install to support
the components. Failure to adhere to the following information will affect the system performance and
functionality:
Table 19. The components supported by each microprocessor
Number of microprocessors
Components the server can support with the number
of microprocessor(s) installed
Microprocessor 1 Onboard LSI SAS controller
ML2 adapter
PCIe slots 6, 7, and 8
Microprocessor 2 PCIe slots 1, 2, 3, 4, and 5
Microprocessor 3 and 4 (these must be installed as a
pair)
A fully-populated server
• The server supports microprocessor failover support. For example, if two microprocessors are installed
and microprocessor 1 fails, the server will switch to microprocessor 2 until the server is serviced. To
ensure that the microprocessor failover support works correctly, do the following:
– Make sure that microprocessor 1 and microprocessor 2 have valid boot devices and paths. That
is, an Ethernet controller or a SAS controller must be installed in slots 1, 2, 3, 4, or 5 to boot from
microprocessor 2.
– Make sure that the boot order in the Setup utility is set up so that microprocessor 1 and microprocessor
2 boot devices are in the boot order.
• The microprocessor voltage regulator modules are integrated on the system board and the microprocessor
and memory expansion tray.
• If you have to replace a microprocessor, you must call for service.
• Read the documentation that comes with the microprocessor, so that you can determine whether you
have to update the server firmware. To download the latest level of the server firmware and other code
updates for your server, go to http://www.ibm.com/supportportal/.
• To order an additional optional microprocessor, contact your Lenovo sales representative or Lenovo
reseller.
• When you order a microprocessor option kit, it comes with a microprocessor installation tool that you must
use to install the microprocessor. The microprocessor installation tool comes with the microprocessor
and a protective cover on the bottom of the microprocessor tool.
• The following table shows the DIMM connectors on the system board and the microprocessor and
memory expansion tray that are associated with each microprocessor.
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Lenovo System x3750 M4 Installation and Service Guide