Chelsio T6225-CR Network Adapter - PCIe 3.0 x8 - 2 x 25 Gigabit Ethernet SFP28

The Chelsio T6225-CR is a high-performance network adapter designed for demanding data center and enterprise environments. Featuring dual 25 Gigabit Ethernet ports via SFP28 connectors, this PCI Express 3.0 x8 card delivers exceptional throughput and low latency for virtualized and converged infrastructures.

Advantages

Leveraging the Chelsio T6 (Terminator 6) ASIC, the T6225-CR provides hardware acceleration for TCP/IP, UDP, iSCSI, FCoE, and RoCEv2, offloading CPU overhead and maximizing application performance. Its support for SR-IOV, VXLAN, NVGRE, and GENEVE enables efficient network virtualization, while RDMA over Converged Ethernet (RoCEv2) ensures ultra-low latency for storage and HPC workloads.

Suitable for

• Data centers requiring high-density 25GbE connectivity
• Virtualized environments with VMware ESXi, Hyper-V, or KVM
• Storage networks using iSCSI, FCoE, or NVMe-oF
• High-frequency trading and financial services
• Cloud and edge computing deployments

Key specifications

• Device Type: Network Adapter
• Form Factor: Plug-in Card (PCIe)
• Interface (Bus) Type: PCI Express 3.0 x8
• Ports: 2 x 25 Gigabit Ethernet (SFP28)
• Data Transfer Rate: 25 Gbps per port
• Controller: Chelsio T6 (Terminator 6) ASIC
• Supported Protocols: Ethernet, iSCSI, FCoE, RoCEv2, NVMe-oF
• Offload Engines: TCP/IP, UDP, iSCSI, FCoE, RoCE
• Virtualization Support: SR-IOV, VXLAN, NVGRE, GENEVE
• Jumbo Frame Support: Up to 9.6 KB
• Power Consumption: Typical 18W, Max 22W
• Operating System Support: Linux, FreeBSD, VMware ESXi, Microsoft Windows
• Bracket Included: Full-height and Low-profile
• RDMA Support: RoCEv2
• Standards Compliance: IEEE 802.3by, 802.3ae, 802.3ap, 802.3aq, 802.3ba, 802.3bj, 802.3bm, 802.3cd, 802.1Qbb, 802.1Qaz, 802.1Qau

Recommendations

For optimal performance, use with SFP28 transceivers or direct attach cables (DAC) rated for 25GbE. Ensure your system has an available PCIe 3.0 x8 or higher slot. Compatible with major operating systems including Linux, Windows Server, VMware ESXi, and FreeBSD.