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Green circuit board with silver bracket and two SFP+ cages

Intel

Intel X520-DA2 dual port 10Gb SFP+ PCIe 2.0 x8 network card

SKU CH-V22S-1FJ16

Dual-port 10Gb SFP+ adapter with Intel 82599ES controller for PCIe 2.0 x8 slots

  • Rated speed(10Gb fiber or DAC support)
  • Interface typePCI Express 2.0 x8 (Low Profile)
  • Supported standardsIEEE 802.3ae, IEEE 802.3ap, IEEE 802.3an, IEEE 802.3ad
  • Connection types2 × SFP+ ports (for fiber or DAC)
  • Bus interfacePCI Express 2.0 x8
  • DriversIntel provides drivers for Windows, Linux, VMware ESXi, and
  • Dual SFP+ ports enable 10 Gb fiber or DAC links
  • PCI Express 2.0 x8 interface delivers 5.0 GT/s bandwidth
  • Low-profile bracket fits 2.7 in height slots
  • Intel 82599ES controller supports IEEE 802.3 standards
  • Drivers included for Windows Linux VMware ESXi and FreeBSD

Dual-port 10Gb SFP+ adapter for servers

The Intel X520-DA2 adds two 10 Gigabit Ethernet connections over SFP+ cages that accept fiber or direct-attach copper cables. It installs in a PCI Express 2.0 x8 slot and includes a low-profile bracket for compact chassis. Driver support covers Windows, Linux, VMware ESXi and FreeBSD.

Passive cooling with no fan noise

The card relies on the system airflow to dissipate heat from the Intel 82599ES controller and SFP+ modules. With no onboard fan it adds zero acoustic load and draws power only from the PCIe slot. The x8 electrical interface runs at 5.0 GT/s, keeping bus utilisation low during sustained transfers.

Low-profile bracket fits 1U racks

At 6.6 by 2.7 by 0.7 inches the board slides into half-height slots without blocking adjacent cards. Two SFP+ cages face the rear panel, leaving cable routing straightforward in dense enclosures. The package supplies the adapter and the low-profile bracket; transceivers or DACs are sourced separately.

How it compares

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

Price $44.99
Cheaper than about 70% of the 1,505 comparable items (median $90.99).

Specifications

Product
Brand nameIntel
Model nameX520-DA2
Part numberX520-DA2
Performance
Rated speed(10Gb fiber or DAC support)
Connectivity
Supported standardsIEEE 802.3ae, IEEE 802.3ap, IEEE 802.3an, IEEE 802.3ad
Ports & slots
Interface typePCI Express 2.0 x8 (Low Profile)
Connection types2 × SFP+ ports (for fiber or DAC)
Bus interfacePCI Express 2.0 x8
Size & build
Product dimensions6.6 in × 2.7 in × 0.7 in
Product weight0.5 lb (0.23 kg)
In the box
In the boxIntel X520-DA2 Dual-Port 10Gb Ethernet Network Adapter
Low-profile bracket
More details
DriversIntel provides drivers for Windows, Linux, VMware ESXi, and FreeBSD operating systems.

Questions about this item

How do I install the X520-DA2 in a low-profile chassis, and what bracket step is often missed?

Insert the card into a PCI Express 2.0 x8 slot, then swap the full-height bracket for the included low-profile bracket before securing the screw; the bracket change is the step most builders forget.

What maintenance or replacement will the X520-DA2 need over time?

The adapter itself has no moving parts; plan to replace SFP+ transceivers or direct-attach copper cables if link errors appear, and re-apply driver updates when the OS kernel changes.

What limit appears first on the X520-DA2 during sustained 10 Gb traffic?

The PCI Express 2.0 x8 interface caps at 5.0 GT/s, so the bus bandwidth becomes the bottleneck before the dual 10 Gb ports saturate.

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