ConnectX®-3 Ethernet Single and Dual QSFP+ Port Adapter Card User Manual Rev 2.0
Mellanox Technologies
13
2 Interfaces
Each adapter card includes the following interfaces:
• “Ethernet Interface”
• “PCI Express Interface”
• “I2C-compatible Interface”
• “LED Interface”
Figure 1: MCX314A-BCBT Card
The adapter cards include special circuits to protect from ESD shocks to the card/server when
plugging copper cables.
2.1 Ethernet Interface
The network ports of the ConnectX®-3 adapter cards are compliant with the IEEE 802.3 Ether-
net standards listed in Table 4, “Features,” on page 11. Ethernet traffic is transmitted through the
cards' QSFP+ connectors.
2.2 PCI Express Interface
The ConnectX®-3 adapter cards support PCI Express 3.0 (1.1 and 2.0 compatible) through an x8
edge connector. The device can be either a master initiating the PCI Express bus operations or a
slave responding to PCI bus operations. The following lists the PCIe interface features:
• PCIe Base 3.0 compliant, 1.1 and 2.0 compatible
• 2.5, 5.0, or 8.0GT/s link rate x8
• Auto-negotiates to x8, x4, x2, or x1
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