Supermicro MicroLP Dual Port 25G SFP28 AOC-C25G-I2S-O

The Supermicro AOC-C25G-I2S-O is a MicroLP form factor network interface card that delivers dual 25GbE SFP28 connectivity on a single PCIe 3.0 x8 slot. Engineered around the Intel XXV710-BM2 controller, it provides up to 50 Gbps total bandwidth with hardware offloads for virtualization, RDMA, and modern overlay networks, making it ideal for dense server environments.

Advantages

With its compact MicroLP design, this adapter fits space-constrained servers without sacrificing performance. Support for SR-IOV, VMDq, and Intel VT-c enables efficient virtual machine networking, while RoCE v2 RDMA reduces latency for storage and HPC workloads. Offloads such as TSO, LSO, and checksum offload free CPU resources, and jumbo frames up to 9.5 KB improve throughput for large data transfers.

Suitable for

• High-density rack servers and blade systems requiring dual 25GbE ports in a low-profile slot
• Virtualized environments leveraging SR-IOV and VMDq for VM density
• Software-defined storage and hyperconverged infrastructure needing RoCE v2 RDMA
• Cloud and edge deployments using VXLAN, NVGRE, or GENEVE overlays
• Data centers upgrading from 10GbE to 25GbE for increased bandwidth

Key specifications

• Controller: Intel Ethernet Controller XXV710-BM2
• Host Interface: PCI Express 3.0 x8
• Ports: 2 x SFP28 (25GbE each, total 50 Gbps)
• Form Factor: MicroLP (Micro Low Profile)
• Network Standards: IEEE 802.3by, 802.3ae, 802.3ad
• Virtualization: Intel VT-c, SR-IOV, VMDq, VXLAN, NVGRE, GENEVE
• Offloads: TCP/UDP/IP checksum, TSO, LSO, RSS, TSS
• RDMA: RoCE v2
• Jumbo Frame: Up to 9.5 KB
• PXE Boot: Yes
• Power Consumption: Typical 10-12W
• LED Indicators: Link/Activity per port
• OS Support: Windows Server, Linux, VMware ESXi, FreeBSD

Recommendations

For system integrators and IT administrators seeking a reliable, high-performance dual 25GbE adapter in a space-saving MicroLP form factor, the Supermicro AOC-C25G-I2S-O offers a compelling blend of throughput, virtualization features, and low power consumption. Verify SFP28 transceiver compatibility and ensure adequate airflow in dense chassis.