10Gb PCI-E NIC Network Card, Dual SFP+ Port, with Intel 82599EN Controller, PCI Express Ethernet LAN Adapter Support Windows Server/Linux/VMware, Compare to Intel X520-DA2(Intel E10G42BTDA)
Brand: 10Gtek

P/N: X520-10G-2S (compare to Intel X520-DA2)
Ethernet Controller(s): 10Gtek controller
Connector & Cable Medium:SFP+ Direct Attach Copper/SFP+
Cabling Type: SFP+ Direct Attached/LC Fiber Cable Twin Axial Cabling up to 10 m
Ports: Dual Port
Ethernet Converged Network and Server Adapters
Connectivity you can count on
Reliable Performance
● Broad OS support
● Optimized for Intel`g Architecture
● Low latency Ethernet
Best Choice for Virtualization
● Leadership in virtual system scalability with Flexible, Port Partitioning (FPP) and intelligent offload
● Broad VM support (VMware ESXi*, Microsoft Hyper-V*,KVM* and Xen*)
Unified Networking
● Full line of 10GbE Converged Network Adapters (CNA)
● Fibre Channel over Ethernet
● iSCSI with trusted, native OS support
● Support for data center bridging with lossless Ethernet
Platform Optimization
● Integrated PCI Express*
● Direct Data I/O Technology

Equipped with high quality original Intel 82599EN controller which supports I/O virtualization and make the servers more stable.
Compatible with Windows Server 2003/ 2008/ 2012, Windows7/8/10/Visa, Linux, VMware ESX.
Dual SFP+ ports let you connect to 10 Gigabit SFP+ module/DAC/AOC for meeting the demands of data center environments. PCI-E X8 Lane is suitable for both PCI-E X8 and PCI-E X16 slots.
Driver CD is included natively. With profile bracket and additional low profile bracket that makes it easy to install the card in a small form factor/low profile computer case/server.
What You Get: 10Gtek 10GbE PCI-E X8 Network Card X520-10G-2S (compare to Intel X520-DA2 ) x1, Driver CD x1, Low-profile Bracket x1. Backed by 10Gtek 30 Days Free-returned, 1 Year Free Warranty and Lifetime Technology Support. PS: Due to the particularity in QNAP/Synology system, for QNAP/Synology users, please contact our customer service before purchase.