MCX516A-CCAT Mellanox 100G PCIe 3.0 x16 Ethernet Network Card

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Happyware Article Number:

SH9N4277-254635

Manufacturer Number:

MCX516A-CCAT

Brand:

Mellanox

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Description Technical details Warranty & Technical Support Reviews Bulk Deals

MCX516A-CCAT

High-Performance 100GbE Dual-Port PCIe Network Adapter delivering low-latency RDMA fabrics with the MCX516A-CCAT

The MCX516A-CCAT is a Mellanox ConnectX-5 EN dual-port 100GbE QSFP28 PCIe 3.0 x16 add-in card designed to remove network bottlenecks in modern x86 and accelerated compute servers. By combining line-rate Ethernet throughput with RoCE RDMA capabilities, MCX516A-CCAT enables predictable east-west latency for clustered applications where CPU cycles and GPU feed rates depend on deterministic transport behavior.

Architecturally, MCX516A-CCAT integrates hardware offloads that reduce host CPU overhead under virtualization and overlay networking. SR-IOV accelerates multi-tenant I/O by presenting scalable virtual functions, while VXLAN, NVGRE, and Geneve offloads keep encapsulation processing in the NIC. RSS and LRO support efficient packet steering and aggregation, and IEEE 1588 PTP timing assists environments that require precise time synchronization across nodes. With PXE boot support, MCX516A-CCAT also fits automated provisioning workflows for bare-metal and stateless infrastructure.

Why Choose the MCX516A-CCAT?

MCX516A-CCAT delivers a strong density-to-performance profile by providing 2 high-speed QSFP28 ports on a single PCIe Gen3 x16 slot, enabling resilient uplinks, storage traffic separation, or fabric redundancy without additional adapters. In RoCE-enabled designs, MCX516A-CCAT supports scalable low-latency fabrics that align with leaf/spine topologies and clustered compute expansion while maintaining enterprise reliability for continuous operation.

Mellanox engineering focuses on deterministic networking under load, emphasizing robust driver maturity, hardware-based acceleration, and compatibility with data center operational standards. This approach makes MCX516A-CCAT a practical building block for consistent performance across heterogeneous server fleets and long lifecycle deployments.

Key Applications:

Leaf/spine data center uplinks
HPC and AI RoCE fabrics
NFV/SDN virtualized networking
High-throughput storage networking
Low-latency east-west traffic

At Happyware - Server Hardware you benefit from non-binding offers tailored precisely to your needs for MCX516A-CCAT rollout planning, and you can secure an extended warranty up to 6 years to align the adapter lifecycle with enterprise maintenance windows.

Technical details of MCX516A-CCAT

Boot Technology:

PXE

Fabric Type:

Ethernet

Form Factor:

Plug-in card

Networking Type:

Ethernet

Offload Protocols:

LRO RSS

PCIe Connector:

x1 PCIe 3.0 16 16

Ports:

x2 QSFP28 100 Gbps ConnectX-5 EN 0

Precision Time Protocol (PTP):

ieee1588

RDMA:

RoCE

Supported Speed Profile:

1G 10G 25G 40G 50G 100G

Virtualization:

SR-IOV NVGRE VXLAN Offload Geneve Offload

How long is the Warranty and how you can get technical support for MCX516A-CCAT

Warranty:	12 months (part)
Advanced replacement:	yes
RMA Url:	https://network.nvidia.com/support/limited-warranty-and-rma-terms/
Description:	Advanced replacements may be available at Mellanox's discretion, but the Customer must return the defective unit within 30 days or be charged. RMA-Number Required, Delivery times can vary but are generally within 30 days of receiving the defective product. On-site service is not standard.