Smbus Interface; Voltage Regulators; Cpld Interface; Heatsink - Nvidia Mellanox ConnectX-6 Dx User Manual

SMBus Interface

ConnectX®-6 Dx technology maintains support for manageability through a BMC. ConnectX®-6 Dx
OCP 3.0 adapter can be connected to a BMC using MCTP over SMBus or MCTP over PCIe protocols as
if it is a standard Mellanox OCP 3.0 adapter. For configuring the adapter for the specific manageability
solution in use by the server, please contact Mellanox Support.

Voltage Regulators

The voltage regulator power is derived from the OCP 3.0 edge connector 12V and 3.3V supply pins.
These voltage supply pins feed onboard regulators that provide the necessary power to the various
components on the card.
CPLD Interface
The adapter card incorporates a CPLD device that controls the networking port LEDs and the scan
chain. It draws its power supply from 3.3V_EDGE.

Heatsink

A heatsink is attached to the ConnectX®-6 Dx IC in order to dissipate the heat. It is attached either by
using 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.
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