Mellanox MCX516A-Cdat Connectx-5 Ex En 100gbe Dual-Port Qsfp28 Pcie 4.0 X16 Adapter
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Product Highlights
- 100GbE Dual-Port Performance: Dual QSFP28 ports delivering up to 100Gb/s per port for high-speed data transfer.
- Ultra-Low Latency Design: Features 750ns delay and supports RDMA/RoCEv2 for efficient HPC and AI workloads.
- Hardware Acceleration Features: Includes T10-DIF, NVMe over Fabric offload, and embedded PCIe switch for storage optimization.
- Broad OS Compatibility: Supports Linux, Windows, VMware, and Kubernetes with DPDK development kit.
- PCIe Gen3/4.0 Support: Backward compatible with PCIe 2.0/1.1, ensuring versatile server integration.
- RoHS Certified Quality: Meets RoHS standards and ODCC compatibility for safe and reliable operation.
- 36-Month Warranty Coverage: Comprehensive 36-month warranty provided for all products by the manufacturer.
- 100% Original Guarantee: All products are brand new, 100% original with official verification support.
Product Attributes
- Customization
- Available
- Type
- Wired
- Bandwidth
- 1000Mbps
- Model NO.
- MCX516A-CDAT
- Interface
- PCI Express
- Transmission Rate
- 1/10/25/40/50/100gbe
- Connecting Medium
- Optical Fibre
- Motherboard Integrated
- Separate Network Card
- Frequency Range
- -
- Type of Network
- 10-Gigabit Ethernet
- Field
- Server
- Series
- Connectx-6 Dx Series
- Latency
- <0.6 μS (Infiniband), <1 μS (Rocev2)
- OS Support
- Linux, Windows, Vmware, Kubernetes
- Power Consumption
- Typical 18W, Max 25W
- Operating Temp
- 0°C to 55°C
- Transport Package
- Carton
- Specification
- Original specification
- Trademark
- Mellanox
- Origin
- China
Product Images of Mellanox MCX516A-Cdat Connectx-5 Ex En 100gbe Dual-Port Qsfp28 Pcie 4.0 X16 Adapter
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Product Description



model | Mellanox MCX516A-CDAT |
brand | Mellanox(NVIDIA Subsidiary) |
product category | 100G Dual-Port Optical Fiber Network Card |
transmission speed | Supports 100GbE High-Speed Data Transfer |
Port configuration | Dual-Port QSFP28 Interface |
Main chip | ConnectX®-5 Network Controller |
Bus type | PCIe Gen3 x16, Backward Compatible with PCIe 2.0/1.1 |
Operating system support | Linux/Windows/FreeBSD/VMware |
Protocol support | RDMA, RoCEv2, TCP/IP, InfiniBand |
Interface characteristics | Supports Single-Mode Fiber and DAC/AOC Cables |
transmission distance | Long-Distance Transmission via Single-Mode Fiber (Distance varies by cable quality) |
Application scenario | Data Center, High-Performance Computing (HPC), AI/ML Acceleration |
Safety characteristics | PCIe Hot-Swap and Low Latency (750ns) |
Authentication and compatibility | RoHS Certified, Compatible with Major 100GbE Switches |

Adaptive routing for reliable transmission
Burst buffer unloading for background checkpoints
NVMe over Fabric uninstall
Embedded PCIe
Enhanced vSwitch/vRouter uninstallation
Flexible pipeline
RoCE covering network
PCIe Gen 3.0/4.0 support
Meet RoHS standards
ODCC compatibility

Industry-leading throughput, low latency, low CPU utilization and high message rate.
Design of Innovative Rack for Storage and Machine Learning Based on Host Chain Technology
Intelligent interconnection for x86, Power and GPU-based computing and storage platforms.
Advanced storage features, including NVMe over Fabric offload.
Intelligent network adapter supporting flexible pipeline programmability
Cutting-edge performance of virtualized networks, including network function virtualization (NFV)
Efficient I/O consolidation to reduce data center cost and complexity.
providesprofessional solutions for high-speed Internet access products and smarttelecommunications products.
others. Guided byour clients'demands, we also provide solutions for Brocade FC SAN,Nvidia InfiniBand and high-speed Ethernet.
With 16 years of experience in the industry and five years of export histo-ry, we value the client-centered principle and
sincerely serve every do-mestic and international client.





Our team has over 10 years of experience in AI server accessories and high-speed network solutions (FC SAN/InfiniBand/Ethernet), with deep industry expertise to deliver optimized solutions for various scenarios.
We maintain a stable supply chain with long-term partnerships with top manufacturers, ensuring sufficient stock and reliable lead times. We provide one-stop services including product selection, solution design and 24/7 after-sales support.
Benefiting from bulk purchasing, we offer highly cost-effective 100% original products at competitive prices.
2. Is the product brand new?
All products are 100% original and new. Official warranty is provided for authorized brands, and self-developed products pass strict quality inspection. Official verification is supported.
3. How long after payment will the goods be dispatched?
In-stock orders: Ship within 1–3 working days after payment confirmation; urgent orders are prioritized.
Out-of-stock/custom orders: Lead time depends on inventory or production, confirmed by customer service.
Delivery may be delayed during holidays. Please check with us before ordering.
4. Is customization acceptable? What is the MOQ?
Customization available for self-developed network cards, optical modules and high-speed cables.
MOQ: 50 pieces for basic customization; ≥200 pieces for complex specifications.
Authorized products only support original standard models, no customization.
Contact customer service for details.
5. Which payment methods and currencies are accepted?
We accept bank transfers (online or counter) to our corporate account.
Order number must be noted for payment verification.
Both RMB and USD are supported.
About the Supplier
This supplier has been audited by TÜV Rheinland. Verify the report on the official TÜV Rheinland website with ID "MIC-ASI246786". Items marked "" are certified.
Company Profile
Beijing Hengzheng Tongchuang Technology Co., Ltd., founded in Beijing in 2009, is a senior provider in data communication and information security. With 16 years of experience, it serves government agencies, enterprises and multinationals, boasting a good reputation under the principle of "Quality First, Service Supreme".
Its main business covers R&D, production and sales of data communication hardware (network cards: Gigabit to 400G; Optical modules: 10G SFP+ to 800G QSFP-DD; High-speed cables: 400G transmission within 100m, 40% cost-saving vs traditional optical fibers; Switches: Industrial (IEC 61850 certified) and data center models, plus accessories), related technical support and information security solutions, with businesses in finance, energy, intelligent manufacturing and the Internet.
Its over 50-people professional team (core members with average 12+ years of experience) includes hardware R&D (LED by senior engineers from renowned tech firms, offering customized services), technical support and sales. It provides 7× 24 global response for support services.
About Our Factory & Business Background
-
Business Type
- Trading Company
- Address
- East half floor, 2nd floor, Office Building, Long Xiang Zhi Ban Group, Huilongguan, Changping District, Beijing
-
Plant Area
- 452 square meters
-
Number of Employees
- 13
-
Registered Capital
- 11,000,000 RMB
-
Terms of Payment
- LC, T/T, D/P, PayPal, Western Union
-
International Commercial Terms(Incoterms)
- FOB, CIF, CFR, EXW
-
Average Lead Time
-
Peak Season Lead Time: within 15 workdays
Off Season Lead Time: within 15 workdays -
Nearest Port
- Beijing Port
-
Minimum Order Quantity
- 1
-
Supply Chain Partners
- 10
Our Production Capability & Technical Expertise
-
Main Products
- Switches, Fiber optic cards, Network cards, Array cards, Optical modules, High-speed cables, Servers, Storage, Hard drives, GPUs
-
Customization Options
- Customization from Samples, Customization from Designs, Full Customization, Minor Customization, Flexible customization
-
ODM Service Available
- Yes
-
OEM Service Available
- Yes
-
R&D Engineers
- 2 people
Our Industry Experience & Global Business Record
-
Year of Establishment
- 2009-08-20
-
Export Year
- 4 Years
-
Main Markets
- Europe, Southeast Asia/ Mideast, Domestic
-
Repeat Buyers Choice
- 50%~80%
-
Number of Foreign Trading Staff
- 7
-
Overseas Agent/Branch
- No
-
New Products Launched in Last year
- No
Our Certifications, Standards & Industry Recognition
-
Cooperated with Fortune 500
- No
FAQ
- What is the transmission speed of this network card?
- It supports 100GbE high-speed data transfer with dual-port QSFP28 interfaces.
- Does this adapter support NVMe over Fabric?
- Yes, it provides NVMe over Fabric target offload to accelerate storage workloads.
- What operating systems are compatible?
- It supports Linux, Windows, FreeBSD, VMware, and Kubernetes.
- Is the product brand new and original?
- Yes, all products are 100% original and new, with official verification supported.
- What is the warranty period for this product?
- We provide a 36-month warranty for all our products.
- How long is the lead time for shipping?
- In-stock orders ship within 1-3 working days; custom orders depend on production time.
- Can I customize this specific Mellanox card?
- Authorized products like this one only support original standard models; no customization is available.
- What payment methods are accepted?
- We accept bank transfers (RMB or USD), LC, T/T, D/P, PayPal, and Western Union.
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US$150.00 / Piece
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