100GbE NIC Card for Mellanox MCX556A-EDAT - HighPerformance PCIe 4.0

In this review the Vogzone 100GbE NIC Card for Mellanox MCX556A-EDAT is evaluated as a purpose-built network adapter for data centers and latencysensitive applications. The bottom line: it is best for system builders and IT teams who need dual QSFP28 ports, RDMA support and PCIe 4.0 bandwidth to drive high throughput and low latency. Performance highlights such as submicrosecond latency and DPDKtested packet rates make the card compelling where raw network performance and virtualization features matter most.

Key Features

• Mellanox connectX5 Ex controller: delivers low latency and high throughput suitable for demanding server and HPC networking workloads.
• Dual QSFP28 ports: supports 10GbE through 100GbE interface speeds so it adapts to different link requirements in data centers.
• PCIe 4.0 x16 interface: provides the bandwidth headroom required to saturate 100Gb links when paired with compatible systems.
• RDMA and RoCE support: reduces CPU overhead and accelerates data movement for distributed storage and clustered applications.
• I/O virtualization (SRIOV): enables efficient allocation of NIC resources across multiple VMs for denser virtualization deployments.
• Wide software support: compatible with mainstream server operating systems and stacks such as DPDK, iSCSI, UEFI, and various Linux distributions.

Who It's For

This card is aimed at network engineers, system integrators, and data center operators who need reliable 100GbE connectivity with advanced offload features like RDMA and SRIOV. Anyone running high throughput software such as DPDK, virtualization hosts, or distributed storage will benefit from the low latency and high messages per second performance.

It is less suitable for casual desktop users or small office setups that do not already have compatible QSFP28 cabling or switches; those buyers should consider simpler 10Gb or 25Gb solutions. Also, full PCIe 4.0 benefits require a server platform with PCIe Gen4 support.

Pros & Cons

Pros

• Industrygrade connectX5 Ex ASIC provides excellent packet rate and low 750ns latency for demanding workloads.
• Flexible dual QSFP28 interfaces cover a wide range of link speeds from 10GbE to 100GbE for deployment flexibility.
• Strong software ecosystem and offload features including DPDK, RoCE v1/v2, and SRIOV improve application performance and virtualization density.
• Includes a lowprofile bracket for compatibility with rack servers and smaller chassis.

Cons

• Requires compatible QSFP28 optics or breakout cables and appropriate switch ports to utilize full speeds.
• To reach PCIe 4.0 performance the host must support Gen4; in older Gen3 slots throughput can be limited.

Specifications

Controller	Mellanox connectX5 Ex (MCX556AEDAT)
Interface	PCIe v4.0 x16 (compatible with 3.0/2.0/1.1)
Ports	Dual QSFP28 (10/25/40/50/100GbE)
Latency	Approximately 750ns
Packet rate	Up to 200Mpps (197Mpps reported with DPDK)
Software features	DPDK, RDMA RoCE v1/v2, SRIOV, iSCSI, IPsec, IEEE1588
Included	Network card and lowprofile bracket

Our Verdict

The Vogzone 100GbE NIC Card is a strong choice for professionals who need a reliable, high performance adapter with advanced offloads and virtualization features. It offers excellent value where infrastructure already supports QSFP28 and PCIe Gen4, delivering low latency and high packet rates for DPDK, RDMA, and VMdense deployments.

Frequently Asked Questions

Does this card support RDMA?
Yes, the adapter supports RDMA including RoCE v1 and RoCE v2 for low CPU overhead networking.

Which operating systems are supported?
It supports a wide range including Windows, Windows Server, mainstream Linux distributions, VMware ESXi, Citrix, FreeBSD and various enterprise Linux variants.

Is PCIe 4.0 required to reach full performance?
PCIe 4.0 x16 provides the best throughput for 100Gb links, but the card is compatible with PCIe 3.0 and earlier with reduced bandwidth.