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Green printed circuit board with gold PCIe x8 edge connector, silver dual SFP+ cages, full-height metal bracket

Intel

Intel X520-DA2 10Gb Dual Port SFP+ Network Card

SKU CH-FTN1-K685N MPN X520-DA2

Dual-port 10 Gbps SFP+ adapter with PCIe 2.0 x8 interface for high-throughput server networking

  • Rated speedPort Speed: 10 Gbit/s per port (dual-port = total potential
  • Interface typeHost Interface: PCI Express 2.0 x8 Backward compatible with
  • Supported standardsIEEE 802.3ae – 10 Gigabit Ethernet over fiber IEEE 802.3x –
  • Connection typesPort Type: SFP+ (Small Form-factor Pluggable Plus) – Accepts
  • Product dimensions6.5 × 2.7 × 0.75
  • Product weight0.45 lb (0.2 kg)
  • Dual 10 Gbps SFP+ ports for high-speed server connectivity
  • PCIe 2.0 x8 host interface delivers up to 40 Gbps theoretical bandwidth
  • Intel 82599ES controller provides reliable 10 Gigabit Ethernet performance
  • High-profile bracket fits standard full-height server and workstation chassis
  • Supports IEEE 802.3ae, 802.1Q and 802.1Qbb for data-center bridging

Dual 10GbE SFP+ Server Adapter

The Intel X520-DA2 is a dual-port 10 Gigabit Ethernet network interface card built around the Intel 82599ES controller. It connects via a PCI Express 2.0 x8 slot and presents two SFP+ cages for fiber or copper transceivers. A high-profile bracket is fitted for standard server or workstation chassis. The card complies with IEEE 802.3ae and related data-center bridging standards.

Virtualization and High-Throughput Workloads

This adapter suits administrators deploying virtualized servers, storage clusters, or high-performance computing nodes that need two independent 10 Gbps links. SR-IOV and VMDq support helps isolate traffic per virtual machine. Buyers who require RJ45 copper ports, a low-profile bracket, or more than two ports should select a different model. SFP+ modules and direct-attach cables are not included.

PCIe 2.0 x8 Host Interface

The card installs in any PCIe x8 or x16 slot running at Gen 2 speeds, providing up to 40 Gbps of theoretical host bandwidth. Each port operates at a line rate of 10.3125 Gbps. Physical dimensions are 6.5 by 2.7 by 0.75 inches and the unit weighs 0.45 lb. Verify that the chassis has a full-height slot and adequate airflow before ordering.

How it compares

Measured against everything we stock in Ethernet Cards & NICs, at today’s prices. Recalculated every night.

Price $48.99
Cheaper than about 68% of the 1,505 comparable items (median $90.99).

Specifications

Product
Brand nameIntel
Model nameX520-DA2
Part numberX520-DA2
Size & build
Product dimensions6.5 × 2.7 × 0.75
Product weight0.45 lb (0.2 kg)

Questions about this item

How much power does the Intel X520-DA2 draw when running at 10 Gbps all day?

The card uses a PCIe 2.0 x8 slot rated for up to 25 W; typical load is well below that ceiling.

Which SFP+ transceivers or cables must I supply to make the dual ports work?

You need two SFP+ SR, LR or compatible modules, or two SFP+ direct-attach copper cables — none are included.

Will the PCIe 2.0 x8 interface run in my older PCIe 1.1 or 2.0 x16 server slot?

Yes, the adapter is backward compatible with PCIe x16 slots and will negotiate to the slot's generation and width.

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