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ConnectX-5 Ex EN Mellanox Network Adapter Card MCX516A-BDAT 40GbE 2x Port QSFP28 4.0 X16
Source ConnectX-5 Ex EN Mellanox Network Adapter Card MCX516A-BDAT 40GbE 2x Port QSFP28 4.0 X16 from ITZKXY. Check availability, compatibility, lead time and…
Product Information:
| Product Category: | NVIDIA ConnectX Network Cards and SmartNICs |
Trade & Delivery:
| MOQ: | 1 |
|---|---|
| Delivery Time: | Confirmed per quotation |
| Supply Ability: | Confirmed for the requested quantity |
Availability, product condition, warranty coverage and delivery schedule are confirmed in the written quotation for each request.
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| Title: | ConnectX-5 Ex EN Mellanox Network Adapter Card MCX516A-BDAT 40GbE 2x Port QSFP28 4.0 X16 | Category: | NVIDIA ConnectX Network Cards and SmartNICs |
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| Views: | 41 | Published: | 2026-01-08 |
Product Description
Mellanox ConnectX-5 MCX516A-BDAT 100GbE Network Interface Card
1. Product Overview
The Mellanox ConnectX-5 MCX516A-BDAT is a high-performance dual-port network card designed for next-generation data centers. It delivers up to 100Gb/s per port Ethernet connectivity with ultra-low latency (750ns) and advanced offload capabilities for cloud, storage, and telecommunications workloads. This NIC card supports PCIe 4.0 and is available in OCP 3.0 form factor, making it ideal for hyperscale and enterprise deployments.
2. Key Features
- Dual-port 100GbE connectivity (also supports 50/40/25/10/1 GbE)
- PCIe 4.0 x16 host interface
- RDMA over Converged Ethernet (RoCE v2)
- NVMe over Fabrics offloads
- Open vSwitch (OvS) hardware offload via ASAP²
- SR-IOV support with up to 512 virtual functions
- Embedded PCIe switch for multi-host configurations
- Hardware-based T10-DIF signature handover
3. Core Technologies
The ConnectX-5 leverages cutting-edge technologies including:
- RDMA (Remote Direct Memory Access)
- RoCE (RDMA over Converged Ethernet)
- NVMe over Fabrics (NVMe-of)
- SR-IOV (Single Root I/O Virtualization)
- ASAP² (Accelerated Switching and Packet Processing)
- PCIe 4.0 with embedded switch capability
4. How It Works
The ConnectX-5 network card offloads network, storage, and virtualization processing from the CPU to the adapter itself. It uses hardware-based encapsulation/decapsulation for overlay networks (VXLAN, GENEVE), processes NVMe-of commands without host intervention, and enables direct memory access between servers and storage via RDMA. This significantly reduces latency and CPU overhead.
5. Applications
- Cloud and Web 2.0 Data Centers
- High-Performance Storage (NVMe-of, iSER, SRP)
- Network Function Virtualization (NFV)
- AI and Machine Learning Clusters
- Telecommunications and 5G Infrastructure
6. Specifications
| Attribute | Value |
|---|---|
| Model | MCX516A-BDAT |
| Form Factor | OCP 3.0 Small Form Factor |
| Ports | 2 |
| Max Speed | 100 Gb/s per port |
| Supported Speeds | 100, 50, 40, 25, 10, 1 GbE |
| Host Interface | PCIe 4.0 x16 |
| Latency | < 750 ns |
| RDMA | Yes (RoCE v2) |
| NVMe-of Offload | Yes |
| Power Consumption | ~15W |
| Compatibility | PCIe 3.0/4.0, Linux, Windows, VMware |
7. Advantages
- Industry-leading message rate: 200M messages/sec
- Hardware offloads reduce CPU utilization by up to 50%
- Supports future protocols via programmable pipeline
- Enhanced virtualization with SR-IOV and ASAP²
- Lowest total cost of ownership (TCO) with Host Chaining technology
8. Service & Support
We provide:
- 1–3 year hardware warranty
- Global shipping (DHL, FedEx, UPS)
- project support
- Driver and firmware updates
- Custom configuration and integration services
9. Frequently Asked Questions
Q: Is this NIC card compatible with VMware?
A: Yes, the ConnectX-5 supports VMware ESXi with full driver support and SR-IOV capabilities.
Q: What cables are supported?
A: It supports DAC, AOC, and optical modules via SFP28 and QSFP28 interfaces.
Q: Can I use this in a PCIe 3.0 slot?
A: Yes, it is backward compatible with PCIe 3.0.
Q: Does it support RoCE?
A: Yes, RoCE v2 is fully supported for low-latency RDMA operations.
Q: What is the difference between ConnectX-5 and ConnectX-6?
A: The ConnectX-6 offers higher throughput (200G) and enhanced security features, while the ConnectX-5 is optimized for 100G environments with robust offloads.
10. Precautions
- Ensure proper cooling in high-density deployments
- Use certified cables and transceivers for optimal performance
- Verify BIOS and firmware compatibility with your server platform
- Follow ESD safety procedures during installation
11. Company Introduction
With over 10 years of industry experience, We work with qualified manufacturing and supply partners and maintain a strong technical team. We have served a wide range of global clients and offer competitive pricing and high-quality service. Our product portfolio includes top-tier brands such as Mellanox, Ruckus, Aruba, and Extreme. We supply condition confirmed in the quotation network switches, NIC cards, wireless access points, controllers, and cables. Our sourcing capacity is confirmed per project, enabling us to support bulk orders and diverse product needs. We provide project support and technical support, backed by a professional sales and engineering team trusted worldwide.
