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Mellanox ConnectX-3 Pro single-port PCIe network card with SFP+ cage

Mellanox Technologies

Mellanox Technologies MCX311A-XCCT 10Gbps network card

SKU CH-EVM6-KTGWV MPN MCX311A-XCCT

Single-port 10Gbps PCIe 3.0 server adapter with SFP+ fibre connectivity and 1µs MPI latency

  • Speed10Gbps
  • InterfacePCI-Express
  • Features1us MPI ping latency Up to 40/56 Gigabit Ethernet per port S
  • Weight0.45 lb.
  • 10 Gbps single-port Ethernet for server workloads
  • PCI Express 3.0 x8 host interface for high throughput
  • SFP+ slot accepts optical fiber modules
  • Hardware offload engines reduce CPU overhead
  • 1 µs MPI ping latency for latency-sensitive apps

10Gbps PCIe Server Adapter

The Mellanox ConnectX-3 Pro MCX311A-XCCT is a single-port 10Gbps network card built for server workloads. It installs in a PCI Express 3.0 x8 slot and connects via an SFP+ transceiver for optical fibre. The adapter targets environments that need low-latency RDMA transport over existing Ethernet infrastructure. It is not suited for desktop builds lacking an x8 slot or SFP+ cabling.

Thermals Power and Noise

The card draws power solely from the PCI Express bus with no auxiliary connector required. Passive cooling relies on chassis airflow; no onboard fan is present so acoustic output is zero. Power consumption scales with link speed up to 56GbE capability but typical 10GbE operation stays within standard slot limits. Operators must ensure the server enclosure provides adequate flow across the heatsink.

Bundled Software Offload Effects

Mellanox supplies drivers that enable CPU offload of transport operations and application offload engines in hardware. Sockets acceleration libraries further reduce latency for MPI traffic, quoted at one microsecond ping latency. Precision clock synchronisation protocols are supported in firmware. No management utilities or diagnostic suites are included in the package.

Highlights

  • 10 Gbps single-port Ethernet for server workloads
  • PCI Express 3.0 x8 host interface for high throughput
  • SFP+ slot accepts optical fiber modules
  • Hardware offload engines reduce CPU overhead
  • 1 µs MPI ping latency for latency-sensitive apps

Specifications

BrandMellanox
ModelMCX311A-XCCT
Speed10Gbps
InterfacePCI-Express
Features1us MPI ping latency
Up to 40/56 Gigabit Ethernet per port
Single- and Dual-Port options available
PCI Express 3.0 (up to 8GT/s)
CPU offload of transport operations
Application offload
Precision Clock Synchronization
HW Offloads for NVGRE and VXLAN encapsulated traffic
End-to-end QoS and congestion control
Hardware-based I/O virtualization
17mm x 17mm RoHS-R6
Weight0.45 lb.
Shipping weight0.20 kg
Package size222 × 171 × 51 mm

Questions about this item

How is the PCI Express x8 card seated in the server, and which step is often missed?

Align the x8 edge connector with a compatible PCIe 3.0 slot, press firmly until the retention bracket clicks, then secure the bracket screw; the step often missed is attaching an SFP+ transceiver before cabling.

What maintenance or replacement will the adapter need over time?

The card itself has no moving parts; only the SFP+ optical modules may need replacement if a link degrades or a different fiber type is required.

What limit appears first when the 10Gbps port runs at sustained line rate?

The PCI Express 3.0 x8 interface caps theoretical throughput at roughly 56 Gbps, so the 10 Gbps Ethernet port will saturate well before the host bus becomes a bottleneck.

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