Built around the Ethernet Controller I350 family, this dual-port 1GbE RJ45 adapter brings proven server-class reliability and features to your PCIe 2.1 x4 slot. Each port supports 10/100/1000BASE-T with auto-negotiation over standard copper cabling up to 100 m, making upgrades simple and cost-effective. Virtualization-ready capabilities such as SR-IOV and VMDq, plus RSS/MSI-X queueing, help improve throughput and reduce CPU load. Enterprise networking features include 9K jumbo frames, IEEE 802.1Q VLAN, 802.3x flow control, and Energy Efficient Ethernet (802.3az). PXE and iSCSI boot are supported for flexible deployment in data centers, labs, and NAS servers. Full-height and low-profile brackets are included for easy fit in 1U/2U chassis or desktops. Also referred to as a PCI network adapter by users (PCIe interface), it's ideal for VMware ESXi, Microsoft Hyper-V, Proxmox VE, Windows Server, Linux, and popular NAS/firewall OSes.