The Intel X520 Dual Port 10GbE Adapter and X520 Dual Port 10GbE SFP+ Embedded Adapter have the following specifications:

• Intel 82599 dual-port 10 Gb Ethernet controller
• Two empty SFP+ cages for SFP+ transceivers or DAC cables
• Supports 1 Gbps and 10 Gbps speeds with the optional SFP+ transceivers
• Supports 10 Gbps speeds with the optional DAC cables
• Standard PCIe low-profile card form factor (X520 Dual Port 10GbE Adapter)
• Mezzanine form factor (X520 Dual Port 10GbE SFP+ Embedded Adapter)
• PCIe 2.0 x8 host interface

Standards supported

Both the Intel X520 adapters support the following IEEE standards:

• IEEE 802.1p Class of Service (CoS) traffic prioritization
• IEEE 802.1Q VLAN tagging
• IEEE 802.3ad Link Aggregation Control Protocol
• IEEE 802.3x Full-duplex flow control

The Intel X520 adapter supports the following standards:

• IEEE 802.3ae 10GBASE-SR short range fiber optics 10 Gb Ethernet
• 10GSFP+Cu SFP+ Direct Attach copper