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Dell 9J2HH ConnectX-4 Lx 2x 25Gb/s PCIE 3.0Full Height Network Adapter
- Ports: 2x 25Gb/s Ethernet
- Interface: PCIe 3.0 x8 (or x16)
- Form Factor: Full Height
- Technology: ConnectX-4 Lx
- Connector Type: SFP28
- RoCE Support: RDMA over Converged Ethernet
- Offloads: TCP/UDP/IP checksum offloads
- Virtualization Support: SR-IOV
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Product Overview
The Dell 9J2HH ConnectX-4 Lx is a high-performance network adapter designed for demanding data center and enterprise environments. It features two 25 Gigabit Ethernet (25Gb/s) ports and utilizes a PCIe 3.0 interface for high-speed connectivity, supporting full-height bracket installation.
Technical Information
| Product Type | Network Adapter |
| Brand | Dell |
| Model | ConnectX-4 Lx |
| SKU | 9J2HH |
Additional Specifications
| Number of Ports | 2 |
| Port Speed | 25Gb/s |
| Interface | PCIe 3.0 |
| Form Factor | Full Height |
Product Description
The Dell 9J2HH, based on the Mellanox ConnectX-4 Lx architecture, is a dual-port 25 Gigabit Ethernet network interface card (NIC) engineered for high-throughput, low-latency networking applications. It connects to the host system via a PCIe 3.0 interface, typically utilizing x8 or x16 lanes to ensure sufficient bandwidth for its high-speed ports. The adapter supports SFP28 transceivers, allowing for flexible fiber optic connectivity at 25Gb/s. This adapter is designed for environments where performance is critical, such as high-performance computing (HPC) clusters, data analytics platforms, and high-frequency trading systems. It incorporates advanced features like RDMA over Converged Ethernet (RoCE) and various offloads (TCP, UDP, IP checksums) to reduce CPU utilization and improve network efficiency. Support for Single Root I/O Virtualization (SR-IOV) enables direct assignment of network resources to virtual machines, enhancing performance and isolation in virtualized environments. With its full-height form factor, the 9J2HH is suitable for installation in standard server chassis. The dual 25Gb/s ports provide redundancy and increased bandwidth, making it an excellent choice for server uplinks, storage networking, and inter-server communication in modern data centers. Its robust feature set and high performance make it a key component for accelerating network-intensive workloads.