Scan code: LN101700 Manufacturer code: MCX516A-CDAT

Mellanox 2 Port PCIe 100 Gigabit Network Adapter Card

Mellanox ConnectX-5 Ex EN MCX516A-CDAT, Dual-Port 100GbE Ethernet Network PCIe Adapter Card, PCIe4.0, 2x QSFP28 100GbE

Scan code: LN101700 Manufacturer code: MCX516A-CDAT
£1,096.99Item currently awaiting an ETA
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From £29.96 / month (APR 14.9%)
Monthly Payment: £98.48
Instalment Rate: 14.9% p.a. (fixed)
Cost of purchase: £1,096.99
Total inc. interest: £1,181.75
Monthly Payment: £52.66
Instalment Rate: 14.9% p.a. (fixed)
Cost of purchase: £1,096.99
Total inc. interest: £1,263.67
Monthly Payment: £37.48
Instalment Rate: 14.9% p.a. (fixed)
Cost of purchase: £1,096.99
Total inc. interest: £1,349.13
Monthly Payment: £29.96
Instalment Rate: 14.9% p.a. (fixed)
Cost of purchase: £1,096.99
Total inc. interest: £1,438.06
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Product Overview

ConnectX -5 EN Card

ConnectX-5 Ethernet adapter cards provide high performance and flexible solutions with up to two ports of 100GbE connectivity, 750ns latency, up to 200 million messages per second (Mpps), and a record setting 197Mpps when running an open source Data Path Development Kit (DPDK) PCIe (Gen 4.0). For storage workloads, ConnectX-5 delivers a range of innovative accelerations, such as Signature Handover (T10-DIF) in hardware, an embedded PCIe Switch, and NVMe over Fabric target offloads. ConnectX-5 adapter cards also bring advanced Open vSwitch offloads to telecommunications and cloud data centres to drive extremely high packet rates and throughput with reduced CPU resource consumption, thus boosting data centre infrastructure efficiency. ConnectX-5 adapter cards are available for PCIe Gen 3.0 and Gen 4.0 servers and provide support for 1, 10, 25, 40, 50 and 100 GbE speeds in stand-up PCIe cards, OCP 2.0, and OCP 3.0 form factors. ConnectX-5 cards also offer advanced Mellanox Multi-Host® and Mellanox Socket Direct® technologies.

Cloud and Web 2.0 Environments

ConnectX-5 adapter cards enable data centre administrators to benefit from better server utilization and reduced costs, power usage, and cable complexity, allowing for more virtual appliances, virtual machines (VMs) and tenants to co-exist on the same hardware.
Supported vSwitch/vRouter offload functions include:
• Overlay Networks (e.g., VXLAN, NVGRE, MPLS, GENEVE, and NSH) header encapsulation & decapsulation.
• Stateless offloads of inner packets and packet headers’ re-write, enabling NAT functionality and more.
• Flexible and programmable parser and match-action tables, which enable hardware offloads for future protocols.
• SR-IOV technology, providing dedicated adapter resources, guaranteed isolation and protection for virtual machines (VMs) within the server.
• Network Function Virtualization (NFV), enabling a VM to be used as a virtual appliance. The full datapath operation offloads, hairpin hardware capability and service chaining enables data to be handled by the virtual appliance, with minimum CPU utilization.

Cloud and Web 2.0 customers developing platforms on Software Defined Network (SDN) environments are leveraging their servers’ Operating System Virtual-Switching capabilities to achieve maximum flexibility. Open vSwitch (OvS) is an example of a virtual switch that allows Virtual Machines to communicate with each other and with the outside world. Traditionally residing in the hypervisor where switching is based on twelve-tuple matching onflows, the virtual switch, or virtual router software-based solution, is CPU-intensive. This can negatively affect system performance and prevent the full utilization of available bandwidth.
Mellanox ASAP2 - Accelerated Switching and Packet Processing® technology enables offloading the vSwitch/vRouter by handling the data plane in the NIC hardware, without modifying the control plane. This results in significantly higher vSwitch/vRouter performance without the associated CPU load.
Additionally, intelligent ConnectX-5’s flexible pipeline capabilities, including flexible parser and flexible match-action tables, are programmable, enabling hardware offloads for future protocols.

Storage Environments

NVMe storage devices are gaining popularity by offering very fast storage access. The evolving NVMe over Fabric (NVMe-oF) protocol leverages the RDMA connectivity for remote access. ConnectX-5 offers further enhancements by providing NVMe-oF target offloads, enabling very efficient NVMe storage access with no CPU intervention, and thus improving performance and reducing latency.
The embedded PCIe switch enables customers to build standalone storage or Machine Learning appliances. As with earlier generations of ConnectX adapters, standard block and file access protocols leverage RoCE for high-performance storage access. A consolidated compute and storage network achieves significant cost-performance advantages over multi-fabric networks. ConnectX-5 enables an innovative storage rack design, Host Chaining, which enables different servers to interconnect without involving the Top of the Rack (ToR) switch. Leveraging Host Chaining, ConnectX-5 lowers the data centre’s total cost of ownership (TCO) by reducing CAPEX (cables, NICs, and switch port expenses). OPEX is also reduced by cutting down on switch port management and overall power usage.


Telecommunications service providers are moving towards disaggregation, server virtualization, and orchestration as key tenets to modernize their networks. Likewise, they’re also moving towards Network Function Virtualization (NFV), which enables the rapid deployment of new network services. With this move, proprietary dedicated hardware and software, which tend to be static and difficult to scale, are being replaced with virtual machines running on commercial off-the-shelf (COTS) servers.
For telecom service providers, choosing the right networking hardware is critical to achieving a cloud-native NFV solution that is agile, reliable, fast and efficient. Telco service providers typically leverage virtualization and cloud technologies to better achieve agile service delivery and efficient scalability; these technologies require an advanced network infrastructure to support higher rates of packet processing. However, the resultant east-west traffic causes numerous interrupts as I/O traverses from kernel to user space, eats up CPU cycles and decreases packet performance. Particularly sensitive to delays are voice and video applications which often require less than 100ms of latency.
ConnectX-5 adapter cards drive extremely high packet rates, increased throughput and drive higher network efficiency through the following technologies; Open vSwitch Offloads (OvS), OvS over DPDK or ASAP², Network Overlay Virtualization, SR-IOV, and RDMA. This allows for secure data delivery through higher-performance offloads, reducing CPU resource utilization, and boosting data centre infrastructure efficiency. The result is a much more responsive and agile network capable of rapidly deploying network services.

Wide Selection of Adapter Cards

ConnectX-5 Ethernet adapter cards are available in several form factors including: low-profile stand-up PCIe, OCP 2.0 Type 1 and Type 2, and OCP 3.0 Small Form Factor. (See the portfolio on the last page.)
Mellanox Multi-Host® technology allows multiple hosts to be connected into a single adapter by separating the PCIe interface into multiple and independent interfaces.
The portfolio also offers Mellanox Socket-Direct® configurations that enable servers without x16 PCIe slots to split the card’s 16-lane PCIe bus into two 8-lane buses on dedicated cards connected by a harness.

Host Management

Host Management includes NC-SI over MCTP over SMBus, and MCTP over PCIe - Baseboard Management Controller (BMC) interface, as well as PLDM for Monitor and Control DSP0248 and PLDM for Firmware Update DSP0267.


• Tag matching and rendezvous offloads.
• Adaptive routing on reliable transport.
• Burst buffer offloads for background checkpointing.
• NVMe over Fabric offloads.
• Backend switch elimination by host chaining.
• Embedded PCIe switch.
• Enhanced vSwitch/vRouter offloads.
• Flexible Pipeline.
• RoCE for overlay networks.
• PCIe Gen 4.0 support.
• RoHS compliant.
• ODCC compatible.
• Various form factors available.


Please note your statutory rights are not affected.

For further information regarding Scan's warranty procedure please see our terms and conditions

12 months
Return to base
DOA Period:
28 days
RTB Period:
12 months
Manufacturer Contact Details
Scan Computers International Limited
Mellanox 2 Port PCIe 100 Gigabit Network Adapter Card
Mellanox 2 Port PCIe 100 Gigabit Network Adapter Card