NICGIGA
NICGIGA 5Gb Base-T Network Card
Bottom line: The NICGIGA 5Gb Base-T Network Card ($36.99 on Amazon as of 2026-10-06): Realtek RTL8126 controller delivers up to 5Gbps over a single RJ45 port; main trade-off: needs a 5GbE or multi-gig switch to get past gigabit speeds.
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*Price sourced from Amazon.com. Last updated 2026-10-06. Price and availability subject to change.
Pros & Cons
Pros
- ✓ Realtek RTL8126 controller delivers up to 5Gbps over a single RJ45 port
- ✓ Auto-negotiates 5G/2.5G/1G/100Mbps, so it works with existing gigabit gear
- ✓ Fits PCIe x1, x4, x8 and x16 slots for flexible placement
- ✓ Includes standard and slim brackets for full-size or compact cases
- ✓ Wake-on-LAN support for remote power-on of desktops and servers
Cons
- ✗ Needs a 5GbE or multi-gig switch to get past gigabit speeds
- ✗ PCIe only; will not work in legacy PCI slots
- ✗ No macOS support listed; only Windows, Windows Server and Linux
- ✗ Single RJ45 port, so no second network or failover on one card
Manufacturer description
The NICGIGA 5Gb Base-T Network Card adds a 5GbE RJ45 port to any desktop, workstation or server with a free PCIe slot. It runs on a Realtek RTL8126 controller and reaches up to 5Gbps for local file transfers, NAS backups and a faster home lab, without replacing your motherboard. If your network isn't fully upgraded yet, the card still works. It auto-negotiates between 5Gbps, 2.5Gbps, 1Gbps and 100Mbps, so it connects to your current gigabit router today and reaches full speed once you add a 5GbE or multi-gig switch. It fits PCIe x1, x4, x8 and x16 slots. It does not fit older PCI slots. Both…
SpecPicks Verdict
SpecPicks scored NICGIGA 5Gb Base-T Network Card using a rating × review-volume × price-fit model applied to published specs and reviews across the retro networking cards category. NICGIGA'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.
Frequently Asked Questions
Will this 5Gb network card work with my gigabit router?
Yes. The card auto-negotiates to 5Gbps, 2.5Gbps, 1Gbps or 100Mbps, so it links at gigabit speed on a 1GbE router. You need a 5GbE-capable switch or router to get the full 5Gbps.
What PCIe slot does the NICGIGA 5G NIC need?
It fits PCIe x1, x4, x8 and x16 slots. It is not compatible with legacy PCI slots.
Does it fit a small form factor or low-profile PC?
The card comes with both a standard bracket and a slim bracket, so it can go in full-size desktops, workstations, servers and mini-tower cases. Check your case's slot height before buying.
Which operating systems are supported?
NICGIGA lists support for Windows 11, Windows 10, Windows Server and Linux. The card uses the Realtek RTL8126 controller, so drivers follow Realtek's support for that chip.
Does the card support Wake-on-LAN, and what support is included?
Yes, Wake-on-LAN is supported, so you can power the system on over the network. NICGIGA offers lifetime technical support. Check the product listing for current warranty terms.
Key Features
- ⭐【5G Network Card 】：Adopting Realtek RTL8126 Controller, it provides up to 5Gbps of extreme speed to ensure the stability of Internet access and local data transmission, effectively preventing packet loss and making the server more stable.Supports Wake-on-LAN function.
- ⭐【Good compatibility】: seamless backward compatibility with 5Gbps/2.5Gbps/1Gbps/100Mbps can auto-negotiate between high-speed and low-speed connections, supports Windows 11/10/Windows Server and Linux.
- ⭐【PCIe to 5Gbe RJ45】: This 5G BASE-T PCIe network adapter converts PCIe slots (X1/X4/X8/16) into 5G RJ-45 Ethernet ports. Note: Only for PCIe ports, not for PCI slots.
- ⭐【Adaptability and heat dissipation】: Comes with standard brackets and slim brackets for different applications such as desktops, workstations, servers, and mini-tower computers. Excellent heat dissipation performance can quickly reduce the temperature and keep the stability of network transmission.
- ⭐【Customer service】： Every NICGIGA 5G NIC is rigorously tested for reliability, quality, and performance. We supply lifetime technical support.
Full Specifications
| Brand | NICGIGA |
|---|---|
| Color | Black |
| Weight | 5g |
| Unit Count | 1.0 Count |
| Model Number | NIC-5G |
| Compatibility | Linux |
| Built-In Media | NIC-5G |
| Mfr Part Number | NIC-5G |
| Number of Packs | 1 |
| Compatible Devices | Desktop |
| Data Link Protocol | Ethernet |
| Data Transfer Rate | 10 Gigabits Per Second |
| Hardware Interface | PCI Express x1 |
| Warranty Description | 1 Year Manufacturer |
| ⭐【PCIe to 5Gbe RJ45】 | This 5G BASE-T PCIe network adapter converts PCIe slots (X1/X4/X8/16) into 5G RJ-45 Ethernet ports. Note: Only for PCIe ports, not for PCI slots. |
| Full listing title | 5Gb Base-T Network Card, Realtek RTL8126 Controller, NICGIGA 5G PCIe Ethernet Adapter Support WOL, 5Gbe RJ45 Port NIC Card, Windows10/11/Windows Server/Linux |
Ready to buy?
5Gb Base-T Network Card, Realtek RTL8126 Controller, NICGIGA 5G PCIe Ethernet Adapter Support WOL, 5Gbe RJ45 Port NIC Card, Windows10/11/Windows Server/Linux 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.
*Price sourced from Amazon.com. Last updated 2026-10-06. Price and availability subject to change.
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