QNAP QNA-UC5G1T USB to 5GbE Adapter
Here is a closer look at QNAP QNA-UC5G1T USB to 5GbE Adapter.
About
Built on the Aquantia (Marvell) AQC111U chip capable of true 5GBASE-T, but bottlenecked by its USB 3.2 Gen1 (5Gbps signaling) host connection — the 8b/10b line coding overhead caps sustained real-world throughput around 3.5Gbps regardless of the 5Gbps link light. macOS lacks native driver support and often force-downgrades to 1Gbps on Apple Silicon.
Ports: 1× Ethernet (5GBASE-T) and 1× USB-C (host, includes USB-C to USB-A bridge cable)
Confirmed with
- Notebook (generic)
Confirmed used with corporate Windows 11 laptops and an iMac, but with real instability: the Aquantia AQC111U controller runs hot under sustained load and users report it dropping off the network entirely, requiring a power cycle. Needs manual MTU 9000 (jumbo frames) and disabling "Low Power 5 Gbps" mode to reduce disconnects.