Intel® Ethernet Converged Network Adapter X550 Series

Networking Specifications
Port Configuration: Dual
Data Rate Per Port: 100Mb/1GbE/2.5GbE/5GbE/10GbE
Intel® Virtualization Technology for Connectivity (VT-c): Yes
Speed ​​& Slot Width: 8.0 GT/s, x 4 Lane
Controller: Intel 550
Package Specifications
System Interface Type: PCIe v3.0 (8.0GT/s)
Low Halogen Options Available: See MDDS
Intel® Virtualization Technology for Connectivity
On-chip QoS and Traffic Management: Yes
Flexible Port Partitioning: Yes
Virtual Machine Device Queues (VMDq): Yes
PCI-SIG * SR-IOV Capable: Yes
Advanced Technologies
iWARP/RDMA: Well
Intel Direct Data I/O Technology: Yes
Intelligent Offloads: Yes
Storage Over Ethernet: iSCSI, FCoE, NFS

Link to datasheet: http://www.intel.com/content/www/us/en/embedded/products/networking/ethernet-x550-datasheet.html