StarTech.com 2-Port 10Gb PCIe NIC with Native Link Aggregation - 10Gbase-t Ethernet Card - 100/1000/10000 Mbps LAN Card (ST20000SPEXI) - network adapter - PCIe 2.0 x8 - 10Gb Ethernet x 2

Add two 10 Gigabit Ethernet ports (10Gbps) to a client, server or workstation through one PCI Express slot. Now, you can add 10 GbE networking, while minimizing your deployment costs. This 10Gbase-T network card (NIC) lets you add two RJ45 ports through a single PCI Express slot, to deliver reliable high-speed network connections to your workstations and servers without draining your budget.
Compatible with a broad range of operating systems, this versatile dual-port NIC is ideal for many business applications that require upgrades to servers or workstations. It's a cost-effective way to enhance your server or computer capabilities by adding two powerful 10-Gigabit Ethernet ports, with support for advanced features such as VLAN tagging, jumbo frames, and Auto-MDIX.
This 2-port PCI Express 10GBase-T network card features the Intel X540 chipset, designed to deliver the power, performance and enhanced capabilities you need for reliable network connections to your server or computer. The X540 chipset provides many advanced features including Intel Virtualization Technology for connectivity and PXE network boot support.
Compliant with IEEE 802.3/u/ab standards, the network card delivers a dependable way to upgrade or replace your existing network ports with dual 100/1000/10G compatible RJ45 ports, providing throughput capability of up 10Gbps in each direction (20Gbps total). It connects through a single, four-lane (x8 or higher) PCI Express slot.
With a dual-profile design, the PCI Express network card installs easily into a wide range of computer/server chassis, regardless of form factor. The card comes equipped for installation in a full-sized chassis, and includes a low-profile/half-height installation bracket that you can use as needed.