Intel I350T4V2BLK Ethernet Server Adapter I350-T4 Quad Port

The Intel Ethernet Server Adapter I350-T4 is a quad-port Gigabit Ethernet PCIe adapter built around Intel's I350 silicon, a controller that has become a data center reference design for good reason. Four independent GbE ports — each capable of 1 Gbps full-duplex — connect over a shared PCIe x4 bus. At GbE speeds, the x4 interface provides roughly 2 GB/s of bus bandwidth, enough headroom to run all four ports at line rate simultaneously without bus saturation. What differentiates this from a consumer adapter isn't raw port speed, but the feature stack underneath: hardware TCP/UDP/IP checksum offload reduces CPU cycles consumed by packet processing, Large Send Offload (LSO) reduces interrupt rates for bulk transfers, Receive Side Scaling (RSS) distributes incoming traffic across multiple CPU cores to avoid single-core bottlenecks, and SR-IOV enables hypervisors to assign physical port resources directly to virtual machines — a capability that measurably reduces vSwitch overhead in VMware ESXi and Microsoft Hyper-V environments.

The I350-T4 is built for environments where network reliability, OS driver longevity, and virtual infrastructure integration matter more than raw speed per port. Typical deployments include: multi-tenant virtualization hosts where each tenant VM benefits from dedicated NIC resources via SR-IOV; network-separated server builds where management, storage (iSCSI), and production traffic need physical isolation; and high-availability clusters where LACP bonding across multiple ports provides both throughput scaling and automatic failover. The hardware iSCSI initiator offload makes it a natural fit alongside SAN or NAS storage environments. It is not the right choice for builds where 10GbE or higher is required — the I350 platform is GbE-only and that ceiling is architectural. But for administrators building reliable, well-segmented server networking at 1 Gbps, Intel's I350 controller remains one of the most proven and broadly supported options available.