Technical Product Specification

Table Of Contents
Intel
®
Server Board S5400SF TPS Functional Architecture
Revision 2.02
Intel order number: D92944-007
17
Note: If the setup option is changed to enable or disable the Intel
®
Virtualization Technology
setting in the processor, the user must perform an AC power cycle for the change to take effect.
3.1.8 Platform Environmental Control Interface (PECI)
PECI is a thermal management interface that uses a single wire bus interface to provide a
communication channel between an Intel
®
processor and an external monitoring device (PECI
host controller). The PECI host controller on this server board is ADT7490*. Intel
®
Xeon
®
processors 5000 sequence provides processor temperature via the PECI interface.
The PECI feature configuration and support is controlled via the processor MSR (Model Specific
Registers). All installed processors must support PECI. The BIOS polls all installed processors
for PECI support. If the PECI feature is supported, then the BIOS enables PECI by
programming the MSRs.
The processor temperature monitoring and management is accomplished by the Integrated
BMC firmware. It is the responsibility of the Integrated BMC firmware to enable the PECI polling
circuitry.
3.1.9 Common Enabling Kit (CEK) Design Support
The server board complies with Intel’s Common Enabling Kit (CEK) processor mounting and
heatsink retention solution. The server board ships with a CEK spring snapped onto the
underside of the server board, beneath each processor socket. The heatsink attaches to the
CEK, over the top of the processor and the thermal interface material (TIM). See the following
figure for the stacking order of the chassis, CEK spring, server board, TIM, and heatsink.
The CEK spring is removable, allowing for the use of non-Intel heatsink retention solutions.
Note: The processor heatsink and CEK spring shown in the following figure are for reference
purposes only. The actual processor heatsink and CEK solutions compatible with this
generation server board may be of a different design.