Heat Sink Interface; Smbus Interface; Voltage Regulators - Mellanox Technologies ConnectX-4 Lx User Manual

2.5 Heat Sink Interface

A heatsink is attached to the ConnectX-4 Lx IC in order to dissipate the heat from the ConnectX-4 Lx IC. It is attached
either by using four spring-loaded push pins that insert into four mounting holes or by screws.
ConnectX-4 Lx IC has a thermal shutdown safety mechanism which automatically shuts down the ConnectX-4 Lx card
in cases of a high-temperature event, improper thermal coupling or heatsink removal.

2.6 SMBus Interface

ConnectX-4 Lx technology maintains support for manageability through a BMC. ConnectX-4 Lx PCIe stand-up adapter
can be connected to a BMC using MCTP over SMBus or MCTP over PCIe protocols as if it is a standard Mellanox
PCIe stand-up adapter. For configuring the adapter for the specific manageability solution in use by the server, please
contact Mellanox Support.

2.7 Voltage Regulators

The voltage regulator power is derived from the PCI Express edge connector 12V supply pins. These voltage supply
pins feed onboard regulators that provide the necessary power to the various components on the card.
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