Intel E10G42BTDABLK X520-DA2 10Gb Ethernet Network Adapter

The Intel Ethernet Converged Network Adapter X520-DA2 (E10G42BTDABLK) is a dual-port 10 Gigabit Ethernet card designed to bring high-speed network connectivity to servers, workstations, and storage appliances. Built around Intel's 82599ES controller — one of the most widely supported 10Gb Ethernet chips in the industry — it provides two SFP+ ports capable of delivering up to 20Gbps of aggregate bandwidth. The adapter slots into a PCIe 2.0 x8 lane and comes in a low-profile form factor, making it compatible with a wide range of server chassis from compact 1U rackmounts to full-tower workstations.

Driver support is a significant strength of the X520-DA2, with native or readily available drivers for Windows Server, major Linux distributions, VMware ESXi, and other hypervisor platforms. Features like SR-IOV (Single Root I/O Virtualization) and VMDq (Virtual Machine Device Queues) make it particularly effective in virtualized environments where network traffic needs to be efficiently distributed across multiple VMs. Whether used for iSCSI storage networking, inter-server communication, or general-purpose high-speed LAN connectivity, the X520-DA2 has earned its reputation as a dependable and cost-effective way to bring 10Gb networking to existing infrastructure.