Datasheet

Intel® Server Board S2600CW Platform Management Intel® Server Board S2600CW Family TPS
82 Revision1.11
The BMC requires the BIOS to send the Set Fan Control Configuration command to the BMC
on every system boot. This must be done after the BIOS has completed any throttling-related
chipset configuration.
Table 12. Fan Profile Mapping
Type Profile Details
OLTT 0 Acoustic, 300M altitude
OLTT 1 Performance, 300M altitude
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 0 Acoustic, 300M altitude
CLTT 1 Performance, 300M altitude
CLTT 2 Acoustic, 900M altitude
CLTT 3 Performance, 900M altitude
CLTT 4 Acoustic, 1500M altitude
CLTT 5 Performance, 1500M altitude
CLTT 6 Acoustic, 3000M altitude
CLTT 7 Performance, 3000M altitude
5.3.14.6.6 Open-Loop Thermal Throttling Fallback
Normal system operation uses closed-loop thermal throttling (CLTT) and DIMM temperature
monitoring as major factors in overall thermal and acoustics management. In the event that
BIOS is unable to configure the system for CLTT, it defaults to open-loop thermal throttling
(OLTT). In the OLTT mode, it is assumed that the DIMM temperature sensors are not available
for fan speed control. The BIOS communicates the throttling mode to the BMC along with the
fan profile number when it sends the Set Fan Control Configuration command.
When OLTT mode is specified, the BMC internally blocks access to the DIMM temperatures,
causing the DIMM aggregate margin sensors to be marked as Reading/State Unavailable. The
BMC then uses the failure-control values for these sensors, if specified in the Tcontrol SDRs,
as their fan speed contributions.
5.3.14.6.7 ASHRAE Compliance
System requirements for ASHRAE compliance is defined in the Common Fan Speed Control &
Thermal Management Platform Architecture Specification. Altitude-related changes in fan
speed control are handled through profiles for different altitude ranges.