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10Gb PCIe NIC Network Card, Intel 82599EN SFP+, X520-DA1 Compatible Single-port 10GbE adapter for NAS and servers, any-vendor DAC or fiber optics, x4 or x8 slot, low and full-height brackets

GENUINE INTEL 82599EN, THE X520-DA1 SILICON/NO VENDOR LOCK ON THE SFP+ CAGE/PLUG AND PLAY ON PROXMOX, TRUENAS, UNRAID AND ESXI/ONLY FOUR PCIe LANES, BOTH BRACKETS IN THE BOX/AIRFLOW, LIKE ANY 10G CARD

Overview

Specs

Reviews

GENUINE INTEL 82599EN, THE X520-DA1 SILICON: Sustained 10 Gigabit throughput for NAS transfers, VM migration and iSCSI storage; the link also steps down to 2.5G, 1G and 100M for a slower switch port
NO VENDOR LOCK ON THE SFP+ CAGE: Third-party DAC twinax, AOC, 10GBASE-SR multimode and 10GBASE-LR single-mode optics all link up, unlike Intel-branded cards that reject modules they do not recognize
PLUG AND PLAY ON PROXMOX, TRUENAS, UNRAID AND ESXI: Also detected by QNAP, Synology, Ubuntu, Debian and CentOS with no driver step; on Windows install the Intel Ethernet Adapter Complete Driver Pack
ONLY FOUR PCIe LANES, BOTH BRACKETS IN THE BOX: Seats in any x4, x8 or x16 slot, leaving the rest of the board free; full-height and low-profile brackets both ship, for ATX towers, 1U and 2U racks, mini-ITX
AIRFLOW, LIKE ANY 10G CARD: The passive heatsink runs warm by design, so give it case airflow or clip a small fan to it in a silent build; jumbo frames to 9KB and checksum offload run in hardware

Additional Information
First Listed on Newegg	October 15, 2026

Please contact the Seller directly for warranty information. Warranty information may also be found on the Manufacturer's website.
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