NICGIGA X520-DA1 (X520-1S) 10Gb SFP+ PCIe Network Card — Intel 82599 Controller

Upgrade your server, workstation, NAS, or virtualization host to true 10 Gigabit networking with the NICGIGA X520-1S 10GbE Ethernet Adapter. Built around the industry-proven Intel 82599ES controller, this single-port SFP+ NIC delivers rock-solid 10Gbps throughput with the broad driver support the 82599 chipset is famous for.

✅ 3 IN STOCK — Brand New in Original Box & Packaging — Ships from the USA

Key Features

• Intel 82599ES Controller — the same chipset used in genuine Intel X520 adapters, ensuring mature, stable drivers across every major OS and hypervisor.
• 10Gbps SFP+ Port — one hot-swappable SFP+ cage for use with 10G optical transceivers (SR/LR) or Direct Attach Copper (DAC/twinax) cables.
• PCIe x8 Interface — plenty of bandwidth headroom; installs in any PCIe x8 or x16 slot.
• Hardware Offloads — TCP/UDP/IP checksum offload, TSO/LSO, and jumbo frame support to reduce CPU load and maximize throughput.
• Virtualization Ready — SR-IOV, VMDq, and multi-queue support make this ideal for VMware ESXi, Proxmox, and Hyper-V hosts.
• Low-Profile Friendly — works in standard and small-form-factor chassis (check included bracket options).

Broad Operating System Support

Thanks to the ubiquitous Intel 82599 driver base, this card is plug-and-play across:

• Windows 10 / 11
• Windows Server 2012 R2, 2016, 2019, 2022
• VMware ESXi / vSphere
• Linux (kernel-native ixgbe driver — Ubuntu, Debian, RHEL, Proxmox VE, TrueNAS, etc.)
• FreeBSD / FreeNAS

Perfect For

• 10G uplinks to a switch for servers and workstations
• High-speed NAS and SAN connectivity (iSCSI, NFS, SMB)
• Virtualization and hyperconverged hosts
• Video editing, backup, and data-migration workflows that need real bandwidth
• Homelab and small-business 10GbE upgrades

Condition & Availability

• Quantity: 3 available
• Condition: Brand new
• Packaging: Original box and original packaging
• Shipping: Ships from within the USA — fast, protected shipping

What's In The Box

• 1x NICGIGA X520-1S 10Gb SFP+ Network Card
• Mounting bracket(s)
• New, in original retail box

Please note: SFP+ transceiver modules and DAC cables are sold separately. This card accepts standard 10G SFP+ optics and twinax cables.

Shipping & Returns Policy

• Ships from the USA — fast dispatch with protected packaging.
• ALL SALES FINAL — No Refunds / No Returns. Please review the listing details and item specifics carefully before purchasing. Message with any compatibility questions before you buy and we're happy to help.