Heatsink; Thermal Sensors - Nvidia ConnectX-6 Dx MCX623432AE-ADAB User Manual

Heatsink

A heatsink is attached to the ConnectX®-6 Dx IC to dissipate the heat. It is connected by four spring-
loaded push pins that insert into four mounting holes.
ConnectX®-6 Dx IC has a thermal shutdown safety mechanism that automatically shuts down the
ConnectX®-6 Dx card in case of a high-temperature event, improper thermal coupling, or heatsink
removal.

Thermal Sensors

The adapter card incorporates the ConnectX IC which operates in the range of temperatures
between 0C and 105C.
There are three thermal threshold definitions which impact the overall system operation state:
• Warning – 105°C: On managed systems only: When the device crosses the 100°C threshold, a
Warning Threshold message will be issued by the management SW, indicating to system
administration that the card has crossed the Warning threshold. Note that this temperature
threshold does not require nor lead to any action by hardware (such as adapter card
shutdown).
• Critical – 115°C: When the device crosses this temperature, the firmware will automatically
shut down the device.
• Emergency – 130°C: In case the firmware fails to shut down the device upon crossing the
Critical threshold, the device will auto-shutdown upon crossing the Emergency (130°C)
threshold.
The card's thermal sensors can be read through the system's SMBus. The user can read these
thermal sensors and adapt the system airflow in accordance with the readouts and the needs of the
above-mentioned IC thermal requirements.
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