Specifications

QSSC-S4R Technical Product Specification Main Board Server Management
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x All 4x power supplies are not installed in the system OR multiple power supplies failed even though all 4x power
supplies are installed (Don’t assert this signal with three or more functional power supplies).
AND
x Processor VR current trip point (default setting: 90% of supported TDP current) is triggered.
AND
x System power utilization is high and exceeds a pre-set limit of 80%.
BMC monitors throttling of CPU and Memory Controller and logs an SEL event. Power throttle sensor is implemented
as manual rearm sensor.
Upon assertion of the sensor offset, BMC starts an internal time of 30 mins. BMC will re-arm the sensor when the timer
expires. The sensor is also re-armed when the system is reset or DC power-cycled.
3.3.4 Memory Throttling
The BMC supports a PLD Power Throttle sensor which is used to log a SEL event when memory controller and/or the
CPUs are throttled encountering an over power drawn condition for the given power supply configuration and
capabilities.
System will throttle Memory controller when
x All 4x power supplies are not installed in the system OR multiple power supplies failed even though all 4x power
supplies are installed (Don’t assert this signal with three or more functional power supplies).
AND
x Memory VR current trip point (default setting: 90% of supported TDP current) is triggered.
AND
x System power utilization is high and exceeds a pre-set limit of 80%.
3.3.5 Chassis Intrusion
The BMC monitors the state of the Chassis Intrusion signal and makes the status of the signal available via the Get
Chassis Status command and the Physical Security sensor state. A chassis intrusion state change causes the BMC to
generate a Physical Security sensor event message with a General Chassis Intrusion offset (00h).
The BMC detects chassis intrusion and logs a SEL event when the system is in the on, sleep, or standby state.
Chassis intrusion is not detected when the system is in an AC power-off (AC lost) state.
The BMC hardware cannot differentiate between a missing Chassis Intrusion cable or connector, and a true security
violation. If the Chassis Intrusion cable or connector is removed or damaged, the BMC will treat it as if the chassis
cover is open, and take the appropriate actions.