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Green PCIe card with two SFP+ cages and silver bracket

Intel

Intel X520-DA2 10Gbps Dual Port PCI-E Device Server

SKU CH-WFPK-50NGK MPN X520-DA2

Dual-port 10 Gbps Ethernet adapter with SFP+ interfaces on a PCIe 2.0 x8 slot

  • Product typeDual-Port 10 Gigabit Ethernet Network Adapter
  • Dual 10 Gbps ports double server bandwidth
  • Intel 82599ES controller handles heavy network loads
  • PCIe 2.0 x8 slot fits x8 and x16 sockets
  • Two SFP+ cages accept fibre or direct-attach cables
  • Supports 10GBASE-SR and 10GBASE-LR Ethernet standards

Dual-Port 10 Gigabit Ethernet Adapter

This Intel X520-DA2 server adapter adds two 10 Gbps network connections through a PCI Express 2.0 x8 slot. It uses the Intel 82599ES controller and presents two SFP+ cages for fibre or direct-attach cables. The card fits x8 and x16 slots and supports 10BASE-SR and 10BASE-LR optics.

Suited for servers needing two 10 Gbps links

Administrators upgrading rack-mount or tower servers to 10 Gigabit Ethernet will find the dual-port layout convenient for link aggregation or separate networks. The SFP+ interface requires separate transceiver modules or DAC cables, so buyers without existing fibre infrastructure must budget for those. Systems limited to PCI Express 1.0 or lacking an x8 electrical slot cannot use the adapter at its rated speed.

PCI Express 2.0 x8 electrical interface

The adapter operates on a 5 GT/s PCIe 2.0 link with eight lanes, which determines the maximum throughput available to the host. Compatibility with x16 physical slots is mechanical only; the electrical width remains x8. If the motherboard provides fewer than eight lanes to the chosen slot, the 10 Gbps per port rate cannot be sustained.

How it compares

Measured against everything we stock in Serial & USB Device Servers, at today’s prices. Recalculated every night.

Price $39.99
Cheaper than about 91% of the 168 comparable items (median $335.99).

Specifications

Product
Brand nameIntel
Model nameX520-DA2
Part numberX520-DA2
Product typeDual-Port 10 Gigabit Ethernet Network Adapter

Questions about this item

What does the 10 Gbps rating mean when the X520-DA2 is installed in a server?

Each of the two SFP+ ports can move data at up to 10 Gbps, giving a combined 20 Gbps of Ethernet throughput when both links are active.

How does the PCI Express 2.0 x8 interface affect real-world speed?

The x8 lane at 5 GT/s provides enough bandwidth for both 10 Gbps ports to run at line rate without bottlenecking the bus.

What slot size and keying does the X520-DA2 need to fit?

It requires a PCIe x8 or x16 slot and uses the standard x8 edge connector; the bracket occupies a single full-height expansion slot.

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