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PCIE X4 Interface to 10GbE SFP+ Optical Port Network Adapter for Desktop PC, Intel 82599ES 10Gb/s Ethernet Controller, 10GbE PCIE NIC Card for Gaming, 10Gb/s SFP+ LAN Adapter for Storage (X520-DA1)
FebSmart

FebSmart PCIE X4 Interface to 10GbE SFP+ Optical Port Network Adapter for Desktop PC

Bottom line: The FebSmart PCIE X4 Interface to 10GbE SFP+ Optical Port Network Adapter is a specs-and-price decision rather than a crowd-consensus one in the expansion cards category. Check the specification table below against one or two close alternatives — on price and spec fit, not on star ratings.

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Mike Perry — Hardware researcher since 2014. For retro PC hardware and period-correct parts, synthesises manufacturer documentation, community compatibility lists and marketplace listings rather than first-hand lab testing. Core beat: GPU performance across gaming, rendering, and local-LLM inference.

Pros & Cons

Pros

  • ✓ Backed by FebSmart's warranty and support channels

Cons

  • ✗ Confirm socket / form-factor / power-rating compatibility against your build before ordering
  • ✗ Price, stock, shipping and returns are set by the retailer and may have changed since this page was last updated

SpecPicks Verdict

SpecPicks scored FebSmart PCIE X4 Interface to 10GbE SFP+ Optical Port Network Adapter using a rating × review-volume × price-fit model applied to published specs and reviews across the expansion cards category. FebSmart's expansion cards lineup sits within the broader category mid-tier; price and specs are the deciding factors over brand loyalty here. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.

Common buyer scenarios for expansion cards of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the retailer's listing before purchase. Prices and stock are set by the retailer and may have moved since this page was last updated.

Key Features

  • 1. FebSmart X520-DA1 is a PCIE 2.0 x4 interface to 1x 10GbE SFP+ optical port network adapter. It is powered by the Intel 82599ES 10Gb/s Ethernet controller, delivers stable 10Gb/s LAN and SAN connectivity for Windows desktops, Windows servers, NAS, Linux PCs, and Data centers, making it ideal for virtualization and storage-intensive environments.
  • 2.Major Chipset: Intel 82599ES 10Gb/s Ethernet Controller; Network Interface: 10GbE SFP+ Port; Media Type: 10GbE SFP+ Transceivers, DAC and AOC Cables; Network Speed: 10GbE & 1GbE; Network Protocol: LAN & SAN; Host Interface: PCIE 2.0 x4 Interface, 20Gbps Total Bandwidth; Optical Transceiver Speed: 10GbE; DAC and AOC Speed: 10GbE.
  • 3. Support IEEE 802.3ae 10GbE and IEEE 802.1z 1GbE; Support IEEE 1588; Support Intel Data Direct I/O Technology; Support Intelligent Offloads; Support Storage Over Ethernet; Support Intel Virtualization Technology for Connectivity include VMDq & SR-IOV; Support On-chip QoS and Traffic Management and Flexible Port Partitioning (FPP); Support Fiber Channel over Ethernet (FCoE); Support Pre-boot Execution Environment (PXE).
  • 4. Need to Install driver on Windows 11, 10, 8.x, 7 32/64bit, Driver Free on Windows Server 2012, 2012R2, 2016, 2019, 2022. Linux need to install IXGBE driver. Support RHEL 9.3-9.4, 8.9-8.10, 9.0 - 9.2, 8.0 - 8.8. SLES 12 SP5, SLES 12 SP4, SLES 15 SP5, SLES 15 SP4 and previous; Support Ubuntu 22.04 LTS, 20.04 LTS and Debian 11; Support Free BSD 14.0~13.3, 13.1 - 13.2, 12.0 - 12.3; Support all VMWare ESXI editions.
  • 5. Comply with Open Fabrics Enterprise Distribution (OFED) and Open Fabrics Windows Distribution (WinOF-2). X520 DA1 must be used with 10GbE SFP+ transceivers paired with LC fiber cables or directly with 10GbE SFP+ AOC and DAC cables. Compliant with PCIE 2.0 standards, delivering 5 GT/s per lane. PCIE x4 interface provides 20 Gbps of bandwidth, enabling full-duplex 10Gb/s Ethernet for both transmit and receive paths.
  • 6. ATTENTION: 1. PCIE x4 interface, works on PCIE x4, x8, x16 slot. 2. Low profile bracket in the package and full height bracket mounted on X520-DA1 network adapter. Compatible with standard size PCs and low-profile PCs.

Full Specifications

BrandFebSmart
ColorMatte Green
Model NumberX520-DA1
CompatibilityPC, Linux
Built-In Media1X X520-DA1, 1X Low Profile Bracket, 1X Mount Screw, 1X User Manual, 1X Mini CD.
Mfr Part NumberX520-DA1
Number of Items1
Compatible DevicesDesktop
Data Link ProtocolEthernet, IEEE 802.3
Data Transfer Rate10 Gigabits Per Second
Hardware InterfaceEthernet, PCIE x 4
Warranty Description1 Year Limited Parts Wrranty.
Item Dimensions L x W x H4.72"L x 4.53"W x 0.72"H
Full listing titlePCIE X4 Interface to 10GbE SFP+ Optical Port Network Adapter for Desktop PC, Intel 82599ES 10Gb/s Ethernet Controller, 10GbE PCIE NIC Card for Gaming, 10Gb/s SFP+ LAN Adapter for Storage (X520-DA1)

Ready to buy?

PCIE X4 Interface to 10GbE SFP+ Optical Port Network Adapter for Desktop PC, Intel 82599ES 10Gb/s Ethernet Controller, 10GbE PCIE NIC Card for Gaming, 10Gb/s SFP+ LAN Adapter for Storage (X520-DA1) is listed on Amazon. Price, availability, shipping and returns are set by Amazon and its sellers — check the listing for current terms. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.

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