Lekuo USB4 8-Port Gigabit Ethernet Adapter Review
If you're running a home lab, NAS setup, or soft router build and need more Gigabit ports than your mini PC or laptop can offer, the Lekuo USB4 8-Port Gigabit Ethernet Adapter (AA24R81) is one of the most capable solutions on the market. In this review, we'll break down what makes it stand out, who it's for, and whether it's worth the investment.
What Is the Lekuo USB4 8-Port Gigabit Ethernet Adapter?
The AA24R81 is a USB4-powered network expansion dock that delivers 8 independent Gigabit RJ45 ports through a single USB4 Type-C connection. It achieves this by housing two PCIe X4 slots internally, each populated with a 4-port Gigabit network card based on the Realtek 8111H chipset — a proven, widely-supported chip known for stability and broad OS compatibility.
Key Specifications
- Interface: USB4 Type-C (Thunderbolt 3/4/5 compatible)
- Ports: 8× 1G RJ45 (full-duplex)
- Chipset: Realtek 8111H × 2
- Bandwidth: Up to 40Gbps (shared)
- Power: External 12V 3A adapter (included)
- OS Support: Windows 10/11, Linux
- Dimensions: 116 × 65 × 84 mm | Weight: 556g
Who Is This For?
This adapter is purpose-built for power users and professionals who need multi-port network access without adding a PCIe card to a desktop. It's ideal for:
- NAS users who want link aggregation (802.3ad LACP) for faster transfer speeds and redundancy
- Soft router builders running pfSense, OPNsense, or iKuai on a mini PC, needing multiple WAN/LAN interfaces
- Server virtualization environments requiring isolated network interfaces per VM
- Network engineers and testers who need multi-port concurrent testing and monitoring
Performance: Does 40Gbps USB4 Deliver?
The USB4 interface provides a theoretical 40Gbps of upstream bandwidth — more than enough to saturate all 8 Gigabit ports simultaneously (8 × 1Gbps = 8Gbps total). In real-world use, the bandwidth headroom means you won't hit upstream bottlenecks even under heavy multi-port load, making it genuinely suitable for production-grade soft routing and NAS link aggregation.
Each port operates independently, so traffic on one port does not interfere with another — a critical requirement for network segmentation and VM isolation.
Compatibility: Thunderbolt 3, 4, and 5
One of the standout features is broad host compatibility. The USB4 Type-C interface is backward compatible with Thunderbolt 3, 4, and 5, meaning it works with a wide range of modern laptops, mini PCs, and servers. Note that macOS is not officially supported — Windows 10/11 and Linux are the recommended platforms.
Setup and Driver Installation
On Windows 10/11, the Realtek 8111H chipset is typically auto-detected. For manual installation or Linux setups, drivers are available for download directly on the product page. The external 12V 3A power adapter must be connected for all 8 ports to function stably — this is not a bus-powered device.
Build Quality and Package Contents
The unit has a solid, compact form factor at 116 × 65 × 84 mm and 556g. It's not rack-mountable out of the box, but its small footprint makes it easy to place alongside a mini PC or NAS enclosure. The package includes everything you need to get started:
- 1× USB4 8-Port Gigabit Ethernet Adapter
- 1× 12V 3A Power Adapter
- 1× 40Gbps USB4/Thunderbolt 4 Data Cable
- 1× User Manual
Verdict
The Lekuo USB4 8-Port Gigabit Ethernet Adapter is a well-engineered solution for anyone who needs serious network expansion without the constraints of a PCIe slot. With 40Gbps USB4 bandwidth, 8 independent Gigabit ports, Realtek chipset reliability, and Thunderbolt 3/4/5 compatibility, it covers virtually every multi-port networking use case — from home lab soft routers to professional NAS and server virtualization setups.
Backed by a 1-year Lekuo warranty and full technical support, it's a confident purchase for network-intensive workloads.