NVIDIA
ConnectX-4 Lx Dual Port 25Gb/s Ethernet Adapter
Best high-speed adapter for demanding enterprise data center networking.
Elevate your network performance with the NVIDIA ConnectX-4 Lx EN Adapter Card. This high-performance card provides robust 25GbE connectivity, perfect for demanding environments. It features a PCI Express 3.0 x8 interface and two SFP ports for optical fiber connections. Designed for efficiency, it supports low latency RoCE, Multi-Host technology, and offers significant CPU offloading for transport and application acceleration. Hardware offloads for tunneling protocols enhance data handling. The adapter ensures compliance with RoHS and WEEE standards, making it a reliable choice for advanced network infrastructure.
$91.99
More ConnectX Options
Owner Satisfaction
4.7
/ 5
Category Rank
14
/ 961
#14 in Network Cards & Adapters
Price vs Category Average
-91%
Below average
Host Interface
3.08
/ PCI Express x
Who it's for
- Data center managers needing high-speed throughput for intensive workloads
- System administrators looking to maximize server CPU efficiency
- Budget-conscious IT teams seeking cost-effective 25GbE networking upgrades
Who should skip it
- Organizations unprepared for additional switch and cabling infrastructure costs
- Enterprises requiring the latest security features or higher bandwidth speeds
- Generalists lacking specialized networking expertise for complex configuration
Performance breakdown
Data Throughput
Dual 25GbE ports provide massive bandwidth for demanding enterprise network traffic.
Latency Efficiency
RoCE support minimizes processing delays for high-speed, real-time data transfers.
CPU Offloading
Advanced hardware acceleration frees up host resources for critical application tasks.
Protocol Versatility
Robust tunneling protocol support handles complex virtualized network environments with ease.
Interface Compatibility
PCIe 3.0 x8 connectivity ensures broad compatibility with standard server architectures.
Infrastructure Reliability
Strict environmental compliance standards ensure long-term stability in professional data centers.
Key Specs
Host Interface
PCI Express 3.0 x8
Total Ports
2
Expansion Slot Type
SFP
Media Type Supported
Optical Fiber
Form Factor
Plug-in Card
Maximum Data Rate
25 Gbps
Environmental Certification
RoHS-6, WEEE
Interface Type
PCI Express 3.0 x8
Features
- Delivers high-speed 25GbE connectivity
- Supports low latency RoCE acceleration
- Enables hardware-based I/O virtualization
- Offloads transport and application operations
- Hardware offloads for tunneling protocols
- Designed for efficient network performance
- RoHS and WEEE compliant for reliability
- Supports 1 and 10 Gb/s speeds
What customers say
Customers overwhelmingly praise the NVIDIA ConnectX-4 Lx for its exceptional performance and reliability in enterprise networking. The adapter is celebrated for delivering ultra-low latency and sustained high throughput, making it ideal for demanding data center applications. Once configured, users report a dependable, set it and forget it operation supported by robust driver availability across major operating systems. While the initial cost is high, the significant gains in stability and speed offer excellent long-term value for mission critical infrastructure. Experienced administrators appreciate its dual port flexibility and proven ability to maximize server utilization and data transfer rates.
Know before you buy
Yes, the ConnectX-4 Lx is backward compatible and supports 1Gb/s and 10Gb/s speeds, allowing you to integrate it into your existing infrastructure before upgrading to 25GbE.
This card features two SFP ports designed for optical fiber connections. You will need compatible SFP28 transceivers and fiber optic cables to match your specific network switch requirements.
Absolutely. The card features hardware offloading for transport and application operations, as well as tunneling protocols, which shifts data processing tasks away from your CPU to improve overall system performance.
Yes, it supports RoCE (RDMA over Converged Ethernet), which provides low-latency data transfers by allowing the adapter to access memory directly without involving the operating system or CPU.
No, this specific model does not support Wake-on-LAN or Jumbo Frames. It is optimized primarily for high-speed, low-latency data throughput and hardware-based virtualization.
The card requires a PCI Express 3.0 x8 slot. Ensure your server has an available slot with these specifications to achieve the full 25Gbps data rate.
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