Discover high-performance fiber optic network interface cards for servers and desktops. Find single and dual port SFP+ adapters with reliable connectivity. Figure 2 below is a physical picture of the Intel X520 series network adapter. As we can see, the network adapter is equipped with ports for inserting optical modules, and its gold. Whether you're upgrading a workstation, scaling a small business network, or building out a hyperscale data center, a fiber network card (NIC, network interface card) is one of the most critical components for connectivity. Copper Ethernet NICs still have their place, but when bandwidth, distance. * The MCX75310AAS-HEAT card supports InfiniBand and Ethernet protocols from hardware version A7 and higher.