The network ports of the ConnectX®-5 adapter cards are compliant with the InfiniBand Architecture Specification, Release 1.3. InfiniBand traffic is transmitted through the cards' QSFP28 connectors.
Ethernet QSFP28 Interfaces
The network ports of the ConnectX®-5 adapter card are compliant with the IEEE 802.3 Ethernet standards listed in Features and Benefits. Ethernet traffic is transmitted through the QSFP28 connectors on the adapter card.
The adapter card includes special circuits to protect from ESD shocks to the card/server when plugging copper cables.
PCI Express Interface
The table below describes the supported PCIe interface in ConnectX-5 adapter cards.
|ConnectX-5 IC||Supported PCIe Interface||Features|
|ConnectX-5 Ex||PCIe Gen 3.0/4.0 (1.1 and 2.0 compatible) through x16 edge connectors||Link Rates: 2.5. 5.0, 8.0GT/s or 16GT/s.|
Auto Negotiation to: x16, x8, x4, x2 or x1.
Support for MSI/MSI-X mechanisms.
|ConnectX-5||PCIe Gen 3.0 (1.1 and 2.0 compatible) through x16 edge connectors|
Link Rates: 2.5. 5.0 or 8.0GT/s.
There are two I/O LEDs, LED0 and LED1, per port to indicate speed and link status. LED0 is bicolor (yellow and green) LED and LED1 is a single color (green) LED.
LED and State
|1Hz blinking Yellow||Beacon command for locating the adapter card|
|4Hz blinking Yellow|
Indicates an error with the link. The error can be one of the following:
FRU EEPROM allows the baseboard to identify different types of Mezzanine cards. MEZZ FRU EEPROM is accessible through MEZZ_SMCLK and MEZZ_SMDATA (Connector A18 and A19). MEZZ FRU EEPROM address is 0xA2 and its capacity is 2Kb.
Heat Sink Interface
A heatsink is attached to the ConnectX-5 IC in order to dissipate the heat from the ConnectX- 5 IC. It is attached either by using four spring-loaded push pins that insert into four mounting holes or by screws.
ConnectX-5 IC has a thermal shutdown safety mechanism which automatically shuts down the ConnectX-5 card in case of a high-temperature event, improper thermal coupling or heatsink removal.
ConnectX-5 technology maintains support for manageability through a BMC. ConnectX-5 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.
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.