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C&N ST7400-E810 dual-port OCP3.0 SFP28 network card with low-profile bracket

C&N

C&N ST7400-E810 25G 25Gb OCP3.0 SFP28 Dual-Port network card

SKU CH-J0JG-D3T3W

Dual-port 25 GbE OCP 3.0 adapter with Intel E810 controller, PCIe 4.0 x8, SFP28, SR-IOV and RDMA support for Windows Server and Linux

  • StandardsIEEE802.3, IEEE802.3u, IEEE802.3ab, IEEE802.3x
  • Speed25 gigabits_per_second
  • InterfacePCI-Express
  • FeaturesDesktop
  • Based on Intel E810 controller enabling NVMe over Fabric TCP support
  • Dual 25G SFP28 ports with 25/10/1GbE multi-speed flexibility
  • PCI Express 4.0 x8 interface with OCP 3.0 SFF standard compliance
  • SR-IOV virtualization with up to 256 VFs and 768 VSIs
  • Broad OS support including Windows Server 2016/2019/2022 and Linux distributions

Dual-Port 25G OCP 3.0 Adapter

The C&N ST7400-E810 25G is a dual-port network interface card built around the Intel E810 controller and compliant with the OCP 3.0 small form factor specification. It connects through a PCI Express 4.0 x8 bus and provides two SFP28 ports operating at 25 Gb/s, with fallback to 10 Gb/s and 1 Gb/s speeds. The card includes both low-profile and full-height brackets for installation in standard or space-constrained servers.

Sustained Load Behaviour

The Intel E810 controller supports concurrency for 256 non-posted requests, enabling consistent throughput for virtualised workloads such as NFV, storage and HPC-AI. Hardware offloads including TCP/UDP segmentation, SR-IOV with up to 256 virtual functions and 768 virtual station interfaces reduce CPU overhead during prolonged traffic. RDMA over iWARP and RoCE v2 plus DPDK support further accelerate data-path processing under continuous demand.

Interface Practical Limits

The PCI Express 4.0 x8 electrical interface caps bidirectional bandwidth at the bus level, so aggregate throughput cannot exceed the lane budget even though each SFP28 port is rated for 25 Gb/s. The adapter remains backward compatible with PCI Express 3.0 slots, but doing so halves the available bus bandwidth and may restrict simultaneous line-rate operation on both ports. Buyers needing more than two 25 Gb/s links or a different form factor must select another adapter.

Highlights

  • Based on Intel E810 controller enabling NVMe over Fabric TCP support
  • Dual 25G SFP28 ports with 25/10/1GbE multi-speed flexibility
  • PCI Express 4.0 x8 interface with OCP 3.0 SFF standard compliance
  • SR-IOV virtualization with up to 256 VFs and 768 VSIs
  • Broad OS support including Windows Server 2016/2019/2022 and Linux distributions

Specifications

BrandC&N
ModelST7400-E810 25G
Part NumberST7400-E810 25G
StandardsIEEE802.3, IEEE802.3u, IEEE802.3ab, IEEE802.3x
Speed25 gigabits_per_second
InterfacePCI-Express
FeaturesDesktop

Questions about this item

How much power does the Intel E810-based ST7400-E810 25G draw under full 25 Gbps load?

The adapter uses the PCI Express 4.0 x8 bus and two SFP28 ports; total power draw depends on the installed optics and server airflow, so consult the Intel E810 datasheet for exact watts.

Which SFP28 modules and cabling must I already own to connect the dual 25G ports?

The card accepts 25GBASE-SR, 25GBASE-LR or 25GBASE-Cu SFP28 modules, plus 10G and 1G equivalents, so have matching transceivers and fibre or copper patch cables ready.

Will the OCP 3.0 SFF form factor fit in my older PCIe 3.0 server chassis?

Yes, the PCIe 4.0 x8 interface is backward compatible with PCIe 3.0 slots, and both low-profile and full-height brackets are included for standard or ultra-thin systems.

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