Technical product specification

Intel® Server Board S2600CP and Intel® Server System P4000CP Platform Management
Intel
®
Server Board S2600CP and Server System P4000CP TPS
Revision 1.8
Intel order number G26942-005
88
support a single ME image. For this case, ME update is only supported by means of BIOS
performing a direct update of the flash component. The recovery image only provides the basic
functionality that is required to perform the update; therefore other ME FW features are not
functional therefore when the update is in progress.
6.6.4 SmaRT/CLST
The power supply optimization provided by SmaRT/CLST relies on a platform HW capability as
well as ME FW support. When a PMBus*-compliant power supply detects insufficient input
voltage, an overcurrent condition, or an over-temperature condition, it will assert the SMBAlert#
signal on the power supply SMBus* (that is, the PMBus*). Through the use of external gates,
this results in a momentary assertion of the PROCHOT# and MEMHOT# signals to the
processors, thereby throttling the processors and memory. The ME FW also sees the
SMBAlert# assertion, queries the power supplies to determine the condition causing the
assertion, and applies an algorithm to either release or prolong the throttling, based on the
situation.
System power control modes include:
1. SmaRT: Low AC input voltage event; results in a onetime momentary throttle for each
event to the maximum throttle state
2. Electrical Protection CLST: High output energy event; results in a throttling hiccup mode
with fixed maximum throttle time and a fix throttle release ramp time.
3. Thermal Protection CLST: High power supply thermal event; results in a throttling hiccup
mode with fixed maximum throttle time and a fix throttle release ramp time.
When the SMBAlert# signal is asserted, the fans will be gated by HW for a short period
(~100ms) to reduce overall power consumption. It is expected that the interruption to the fans
will be of short enough duration to avoid false lower threshold crossings for the fan tach
sensors; however, this may need to be comprehended by the fan monitoring FW if it does have
this side-effect.
ME FW will log an event into the SEL to indicate when the system has been throttled by the
SmaRT/CLST power management feature. This is dependent on ME FW support for this
sensor. Please refer ME FW EPS for SEL log details.
6.6.4.1 Dependencies on PMBus*-compliant Power Supply Support
The SmaRT/CLST system feature depends on functionality present in the ME NM SKU. This
feature requires power supplies that are compliant with the PMBus* Specification rev1.2.
6.7 EU Lot 6 Mode
The European Union has set forth a stringent standby power consumption target for systems
that are used as primary computing devices in office environments. Owing to the fact in office
environments, pedestal servers are being used more and more as workstations and that Value
servers could make their way into Home servers, this solution is being requested for some
pedestal servers. HW support for EU Lot6 will only be available for specific pedestal products.
In order to meet the standby power requirements for EU Lot6, it is necessary to remove power
to the BMC, along with other components, when in the S5 state. As this operational mode
impacts system feature support, the user has the option of enabling and disabling this mode by
the BIOS setup screen utility.