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Dual PCIe 3.1 2.5GBase-T Network Adapter with Intel I225-V / I226-V 2500/1000/100Mbps PCI Express Gigabit Ethernet NIC Card RJ45 LAN Controller for Windows 10/11 with Low Profile Bracket
ULANSeN

ULANSeN Dual PCIe 3.1 2.5GBase-T Network Adapter

Bottom line: The ULANSeN Dual PCIe 3.1 2.5GBase-T Network Adapter: Intel I226-V controller cuts power draw and packet errors vs older I225-V silicon; main trade-off: 180-day warranty is short next to the 1-3 years many NIC vendors offer.

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By , Founder & Editor-in-Chief · Listing data updated

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

  • ✓ Intel I226-V controller cuts power draw and packet errors vs older I225-V silicon
  • ✓ Two 2.5GBase-T RJ45 ports on one x1 card, so no second slot burned
  • ✓ Falls back to 1000BASE-T, 100BASE-TX and 10BASE-TE per 802.3bz/ab
  • ✓ Drivers span Win10/11, Linux 5.8+, RHEL 8.x, Ubuntu 22.04, ESXi 7/8, OPNsense-class OSs
  • ✓ Low-profile bracket included and seats in x1 through x16 slots

Cons

  • ✗ 180-day warranty is short next to the 1-3 years many NIC vendors offer
  • ✗ PCIe 3.1 x1 at 5GT/s caps aggregate throughput below two saturated 2.5G links

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SpecPicks Verdict

SpecPicks scored ULANSeN Dual PCIe 3.1 2.5GBase-T Network Adapter using a rating × review-volume × price-fit model applied to published specs and reviews across the retro networking cards category. ULANSeN's retro networking 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 retro networking 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

  • PCI Express 3.1 :5GT/s Support for x1 width (Lane).The I225-V has been discontinued, and the I226-V will replace it. The two models have identical functionality. Compared to the I225, the I226 has improved error rates, offering better data packet stability over longer cable lengths and providing a more stable network connection. It also enhances the accuracy and stability of data transmission. Additionally, the I226 reduces active power consumption compared to the I225, making it more energy-efficient
  • Network Interfaces:Integrated MAC + BASE-T PHY. MDI (Copper) standard IEEE 802.3 Ethernet interface for 2500BASE-T, 1000BASE-T, 100BASE-TX, and 10BASE-TE applications (802.3, 802.3u, 802.3bz, and 802.3ab)
  • Compatible for X1,X2,X4,X8,X16，Comes with low profile bracket
  • Support Win10/11,Linux Kernel 5.8/5.16.18,RHEL 8.1/8.3/8.6,Ubuntu* 22.04 LTS,FreeBBSD 13.0,VMware ESXi7.0/8.0,DPDK 20.05/22.07,OPENWRT/UNRAID/PVE.Support PXE function
  • 180 day worry-free warranty and friendly customer service. If you have any questions, we will help you solve the problem when you need it, and if it can’t be solved, we will provide a refund and no return is required

Full Specifications

BrandULANSeN
Model NumberDual I225
CompatibilityMac, Linux
Built-In Media1 x Low profile bracket, 1 x PCIe I225-V Single-2.5G Network Card, 1 x User’s Manual
Number of Items1
Number of Packs1
Compatible DevicesDesktop
Data Link ProtocolEthernet, IEEE802.3bz, IEEE802.3ab ,IEEE802.3u ,IEEE802.3,802.3x ,IEEE802.3z,IEEE802.3az
Data Transfer Rate2.5 gigabits_per_second
Hardware InterfacePCI Express 3.0, PCI Express x1
Warranty Description1 Year
Item Dimensions L x W x H3.46"L x 2.6"W x 0.78"H
Full listing titleDual PCIe 3.1 2.5GBase-T Network Adapter with Intel I225-V / I226-V 2500/1000/100Mbps PCI Express Gigabit Ethernet NIC Card RJ45 LAN Controller for Windows 10/11 with Low Profile Bracket

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Dual PCIe 3.1 2.5GBase-T Network Adapter with Intel I225-V / I226-V 2500/1000/100Mbps PCI Express Gigabit Ethernet NIC Card RJ45 LAN Controller for Windows 10/11 with Low Profile Bracket 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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Dual PCIe 3.1 2.5GBase-T Network Adapter with Intel I225-V / I226-V 2500/1000/100Mbps PCI Express Gigabit Ethernet NIC Card RJ45 LAN Controller for Windows 10/11 with Low Profile Bracket
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