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Black PCIe network card with single RJ45 port and silver heatsink

No Sew

No Sew NIC-2.5G 2.5Gbps PCIe RJ45 network card

SKU CH-XAH2-CM1ZS

Adds a 2.5Gbps RJ45 Ethernet port via PCIe with Realtek RTL8125B for faster wired networking

  • Connectors1 x RJ45
  • FeaturesNIC-2.5G, 2500 megabits_per_second, Desktop, 1 Year Manufact
  • Dimensions14.33in W x 12.83in H x 9.06in D
  • Weight0.09 kilograms
  • Disclaimernot_applicable, 1 Year Manufacturer
  • 5Gbps wired throughput via Realtek RTL8125B for faster downloads and file transfers
  • Windows 11/10/8.1/8/7 and Linux support with automatic Windows 10 driver install
  • Converts PCIe x1/x4/x8/x16 slot to 2.5GBASE-T RJ45 Ethernet port
  • Full-height and low-profile brackets included for ATX, mATX and small form factor cases
  • Integrated heat sink for stable continuous operation backed by 1-year manufacturer warranty

2.5G PCIe Network Adapter

The No Sew NIC-2.5G adds a single 2.5GBASE-T RJ45 port to any desktop with a free PCI Express x1, x4, x8 or x16 slot. It targets users who need faster wired throughput for large file transfers, game downloads or NAS access without replacing their motherboard.

Realtek RTL8125B 2.5Gbps Chipset

The card runs at 2500 megabits per second and falls back to 1Gbps and 100Mbps links automatically. Driver support covers Windows 11, 10, 8.1, 8 and 7 plus Linux; Windows 10 typically installs the driver without manual steps.

Passive Heat Sink and Dual Brackets

An integrated heat sink dissipates heat silently so the adapter maintains stable throughput under continuous load. Both full-height and low-profile brackets are included, allowing installation in standard ATX, micro-ATX or small form factor cases.

Highlights

  • 5Gbps wired throughput via Realtek RTL8125B for faster downloads and file transfers
  • Windows 11/10/8.1/8/7 and Linux support with automatic Windows 10 driver install
  • Converts PCIe x1/x4/x8/x16 slot to 2.5GBASE-T RJ45 Ethernet port
  • Full-height and low-profile brackets included for ATX, mATX and small form factor cases
  • Integrated heat sink for stable continuous operation backed by 1-year manufacturer warranty

Specifications

Part NumberNIC-2.5G
Connectors1 x RJ45
FeaturesNIC-2.5G, 2500 megabits_per_second, Desktop, 1 Year Manufacturer
Dimensions14.33in W x 12.83in H x 9.06in D
Weight0.09 kilograms
Disclaimernot_applicable, 1 Year Manufacturer

Questions about this item

What does 2.5 Gbps mean for everyday file transfers and game downloads?

The Realtek RTL8125B chipset delivers up to 2.5 Gbps over standard Cat5e or better cabling, so large NAS backups and game installs move roughly two-and-a-half times faster than a 1 GbE link while falling back to 1 Gbps or 100 Mbps on older switches.

Which PCIe slot versions and lane widths does the card accept?

It fits any PCI Express x1, x4, x8 or x16 slot (gen 1.0 or newer) and presents a single 2.5GBASE-T RJ45 port; legacy PCI slots are not supported.

Will the included brackets let me install this in a slim small-form-factor case?

Yes — both a full-height and a low-profile bracket are supplied, so the 3.94 in by 2.36 in board fits standard ATX, micro-ATX and compact chassis alike.

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