Chelsio T520-CR Dual Port 10GbE SFP+ PCIe 3.0 x8 Network Adapter

The Chelsio T520-CR is a high-performance dual-port 10 Gigabit Ethernet network adapter designed for data centers and enterprise environments. Featuring the Chelsio T5 (Terminator 5) ASIC, it delivers aggregate throughput of 20 Gbps and supports advanced offload engines including TCP/IP Offload Engine (TOE), iSCSI, FCoE, and RoCE. The adapter is ideal for virtualized environments with SR-IOV and NPAR support, and it is compatible with major operating systems such as Windows, Linux, FreeBSD, VMware ESXi, and Citrix XenServer.

Advantages

With its low-profile, half-height PCIe 3.0 x8 form factor, the T520-CR fits into a wide range of servers and workstations. The dual SFP+ ports provide flexible connectivity for 10GbE networks, while hardware offloads reduce CPU overhead and improve application performance. Support for NVMe-oF and RDMA over Converged Ethernet (RoCE) enables low-latency storage and high-performance computing workloads.

Suitable for

• Enterprise data centers requiring high-bandwidth 10GbE connectivity
• Virtualized environments leveraging SR-IOV and NPAR for efficient resource allocation
• Storage networks using iSCSI, FCoE, or NVMe-oF protocols
• High-performance computing clusters needing low-latency RDMA

Key specifications

• Host Interface: PCI Express 3.0 x8
• Network Interface: 2 x 10 Gigabit Ethernet SFP+
• Controller Chipset: Chelsio T5 (Terminator 5) ASIC
• Data Transfer Rate: 20 Gbps aggregate, 10 Gbps per port
• Form Factor: Low-profile, Half-height, Half-length PCIe Card
• Supported Protocols: Ethernet, iSCSI, FCoE, RoCE, NVMe-oF
• Offload Engines: TCP/IP Offload Engine (TOE), UDP Offload, iSCSI/FCoE Offload
• Virtualization Support: SR-IOV, NPAR, VXLAN, NVGRE
• Jumbo Frame Support: Up to 9.6 KB
• Flow Control: IEEE 802.3x
• VLAN Support: IEEE 802.1Q
• Link Aggregation: IEEE 802.3ad
• PXE Support: Yes
• Operating System Support: Windows, Linux, FreeBSD, VMware ESXi, Citrix XenServer
• Power Consumption: Max 15W
• LED Indicators: Link/Activity per port

Recommendations

For optimal performance, pair the T520-CR with compatible SFP+ transceivers and ensure your system has an available PCIe 3.0 x8 slot. This adapter is an excellent choice for upgrading server connectivity to 10GbE without replacing existing infrastructure.