Why is my USB Ethernet capped at 1Gbps? Boosting to 5Gbps with Lanstar

As I handle large, high-resolution video files and high-fidelity audio data on my NAS, I have realized just how restrictive the standard Gigabit environment truly is. While 1Gbps theoretically supports 125MB/s, in practice, it often struggles to exceed 100MB/s. Moving hundreds of gigabytes to a NAS only to return after a break and still see a stagnant progress bar is incredibly frustrating. That led me to the Lanstar LS-UAC50, a 5Gbps wired Ethernet adapter. With 10Gbps hardware still being prohibitively expensive and 2.5Gbps feeling like an incremental update, this felt like the most logical middle ground.

The packaging is minimal, containing only the adapter and a user manual. Personally, I appreciate this straightforward approach. A unique feature is the dual interface design, which includes both Type-A and Type-C connectors in one unit. Not having to carry extra dongles is a huge plus for someone like me who switches between a desktop and a laptop. The lack of a driver CD also aligns perfectly with modern trends.

The design is clean and professional. It features a black aluminum alloy casing that feels premium and surprisingly sturdy. It blends perfectly with my desk setup, which consists mostly of black peripherals. The unit itself is noticeably larger and thicker than standard 1Gbps adapters, likely to provide better heat dissipation for high-speed data transfers.

The core of this device is Realtek’s latest RTL8157 chipset. This is a significant upgrade over the common 2.5G-capable RTL8156. Since 5Gbps effectively saturates the USB 3.0 bandwidth, hardware design is critical. Lanstar utilizes the USB 3.2 Gen2 standard, which clearly helps in minimizing data bottlenecks.

Upon receiving the device, I plugged it into my main PC’s front USB port to test it. Initially, it was only recognized at 2.5Gbps. I discovered the issue was that the port I used was USB 3.2 Gen1. Moving it to the red Gen2 port on the motherboard’s rear allowed it to hit the full 5Gbps. While my older laptop can’t fully utilize the max speed, the jump over standard wireless speeds and the inherent stability of a wired connection make it a worthy upgrade for a server setup.

Pros

• Affordable 5G networking for under $20
• Plug-and-play compatibility with Windows 11 and Android (Ubuntu server requires a driver update)
• Convenient integrated Type-A/C connector

Cons

• The bulky size may look a bit awkward when connected to thin laptops
• Noticeable warmth after 10 minutes of heavy file transfers

One final tip: before purchasing the Lanstar LS-UAC50, ensure your network infrastructure supports it. Even if the adapter supports 5Gbps, your router or switching hub must also support these speeds, or you will be capped at the slowest link. Furthermore, you must use at least a Cat.6 (or higher) Ethernet cable to prevent signal loss. For those using Linux or Synology NAS systems, verify your kernel version or driver requirements beforehand. While it worked instantly on Windows and Android, I had to manually install drivers for my Ubuntu server.

Upgrading your hardware is always exciting. The LS-UAC50 is a fantastic solution for those looking to maximize efficiency with minimal investment. If you have been feeling limited by the bottlenecks of a Gigabit connection, this is definitely worth trying. I hope this helps anyone looking to move away from unstable wireless connections toward the reliable, high-speed performance of a 5Gbps wired setup.

Lanstar LS-UAC50 5Gbps USB Type-A/C Ethernet Adapter naver.me