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Green circuit board with two RJ-45 ports and gold edge connector

DELL

DELL X520-DA2 10Gb dual-port Ethernet expansion card

SKU CH-MCW9-K4BN5 MPN X520-DA2

Dual-port 10 Gbps Ethernet adapter installs in a PCI Express x8 slot and includes a low-profile bracket

  • TypeEthernet Adapter
  • External USB PortsNone
  • Internal USB PortsNone
  • External 1394 PortsNone
  • Internal 1394 PortsNone
  • External Ports2 x RJ-45
  • Dual 10 Gbps Ethernet ports for high-speed networking
  • PCI Express x8 interface fits desktop and server systems
  • Supports SFP+ fiber or direct-attach copper cabling
  • Low-profile bracket included for compact chassis builds
  • Compatible with Windows, Linux, VMware ESXi and FreeBSD

Dual-port 10Gb Ethernet adapter

The DELL X520-DA2 adds two RJ-45 ports running at up to 10 Gbps each through a PCI Express x8 slot. It targets administrators upgrading desktop or server systems to 10Gb wired networking without changing cabling infrastructure. The low-profile bracket fits compact chassis while the Intel controller supports Windows, Linux, VMware ESXi and FreeBSD.

IEEE 802.3an practical limits

The card implements IEEE 802.3an for 10GBASE-T over copper twisted pair, which requires Category 6a or better cabling to reach the full 10 Gbps per port. Cable runs must stay within the 100-metre channel limit defined by the standard and signal quality degrades sharply with poorer cable categories or excessive connector loss.

Verify slot width and bracket clearance

Confirm the host system has a free PCI Express x8 or wider slot; an x4 physical slot will not provide the required lane count even if the card fits mechanically. Ensure the low-profile bracket matches the chassis slot height and that the operating system in use appears in the supported list before ordering.

Highlights

  • Dual 10 Gbps Ethernet ports for high-speed networking
  • PCI Express x8 interface fits desktop and server systems
  • Supports SFP+ fiber or direct-attach copper cabling
  • Low-profile bracket included for compact chassis builds
  • Compatible with Windows, Linux, VMware ESXi and FreeBSD

Specifications

BrandDell
SeriesX520-DA2
ModelX520-DA2
TypeEthernet Adapter
External USB PortsNone
Internal USB PortsNone
External 1394 PortsNone
Internal 1394 PortsNone
External Ports2 x RJ-45
Internal PortsPCI Express x8 slot
StandardIEEE 802.3ae, IEEE 802.3ap, IEEE 802.3an, IEEE 802.3ad
Data Transfer RateUp to 10 Gbps per port
Operating Systems SupportedWindows, Linux, VMware ESXi, FreeBSD
Cache Size/SpeedNone
CompatibilityDesktop and server systems with a PCI Express x8 or higher slot; supports SFP+ 10Gb fiber or DAC connections
Dimensions6.6 in × 2.7 in × 0.7 in
Weight0.5 lb
Package ContentsIntel X520-DA2 Dual-Port 10Gb Ethernet Network Adapter
Low-profile bracket

Questions about this item

Should I pick the dual-port 10 Gbps model or a single-port alternative?

This card provides two RJ-45 ports, each capable of up to 10 Gbps, so you get twice the throughput in one PCIe slot.

Will I actually see 10 Gbps throughput in my desktop?

Real-world speeds reach close to 10 Gbps per port when the CPU, PCIe x8 lane width and cabling all support the rate.

Does the PCIe x8 interface limit the total bandwidth?

The x8 slot supplies enough lanes for both ports to run at 10 Gbps simultaneously without a bottleneck.

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