Technical Product Specification

Intel
®
Server Board S2400EP TPS Platform Management Functional Overview
Revision 2.0 Intel order number G50763-002
63
Type
Profile
Details
OLTT
2
Acoustic, 900M altitude
OLTT
3
Performance, 900M altitude
OLTT
4
Acoustic, 1500M altitude
OLTT
5
Performance, 1500M altitude
OLTT
6
Acoustic, 3000M altitude
OLTT
7
Performance, 3000M altitude
CLTT
1
300M altitude
CLTT
3
900M altitude
CLTT
5
1500M altitude
CLTT
7
3000M altitude
Each group of profiles allows for varying fan control policies based on the altitude. For a given
altitude, the Tcontrol SDRs associated with an acoustics-optimized profile generate less noise
than the equivalent performance-optimized profile by driving lower fan speeds, and the BIOS
reduces thermal management requirements by configuring more aggressive memory throttling.
The BMC only supports enabling a fan profile through the command if that profile is supported
on all fan domains defined for the given system. It is important to configure platform Sensor
Data Records (SDRs) so that all desired fan profiles are supported on each fan domain. If
no single profile is supported across all domains, the BMC, by default, uses profile 0 and does
not allow it to be changed.
6.8.3 Thermal Sensor Input to Fan Speed Control
The BMC uses various IPMI sensors as input to the fan speed control. Some of the sensors are
IPMI models of actual physical sensors whereas some are “virtual” sensors whose values are
derived from physical sensors using calculations and/or tabular information.
The following IPMI thermal sensors are used as input to the fan speed control:
 Front panel temperature sensor
 Baseboard temperature sensors
 CPU DTS-Spec margin sensors
 DIMM thermal margin sensors
 Exit air temperature sensor
 Global aggregate thermal margin sensors
 SSB (Patsburg) temperature sensor
 On-board Ethernet controller temperature sensors (support for this is specific to the
Ethernet controller being used)
 Add-in Intel
®
SAS/IO module temperature sensor(s) (if present)
 Power supply thermal sensors (only available on PMBus*-compliant power supplies).
The following illustration provides a simple model showing the fan speed control structure that
implements the resulting fan speeds.