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Space Gray USB-C to RJ45 adapter with aluminium finish

UGREEN 35921 USB-C to Ethernet Adapter 5 Gbps Space Gray

SKU CH-RXRE-XVGAC

Adds a 5 Gbps wired network link to USB-C laptops with aluminum cooling and Realtek RTL8157 chip

  • Rated speed5 Gbit/s
  • Product colorSpace Gray
  • Details5 Gbit/s, 9.4 L x 3.3 W x 1.5 H centimeters, 82 g, Space Gra
  • 5 Gbps wired speed, four times faster than Gigabit Ethernet
  • Realtek RTL8157 chip lowers power draw and heat for stable operation
  • Aluminium casing with integrated heat-dissipation holes keeps temperatures down at high throughput
  • Works with Windows 11, macOS 15 and Linux Kernel 5.17 — driver install needed for Windows and Linux
  • Supports Wake-on-LAN, Wake-on-WAN, EEE and Auto MDI/MDIX for flexible network management

UGREEN 5 Gbps USB-C Ethernet Adapter

This adapter adds a 5 Gbps wired network port to laptops and desktops that only have USB-C or Thunderbolt connectivity. It targets users who need faster-than-gigabit speeds for NAS transfers, video editing or large-file workflows. The aluminium housing includes integrated heat-dissipation holes to keep the Realtek RTL8157 chip stable under load.

Capacity and headroom: 5 Gbps throughput

At 5 Gbps the adapter delivers up to 400 percent more bandwidth than a standard gigabit link, comfortable for multi-gig internet plans and local 2.5 Gbps or 5 Gbps switches. Performance drops to lite mode automatically if thermal limits are reached, and the link will not reach 5 Gbps unless the host port supports USB 3.2 Gen 2 (10 Gbps), the router or switch is 5 Gbps capable and a CAT6 or better cable is used.

Upgrade path and when it matters

It replaces any 1 Gbps USB-C dongle when the network infrastructure already runs at 2.5 Gbps or 5 Gbps and the host has a 10 Gbps USB-C or Thunderbolt port. The jump is not worthwhile on gigabit-only networks, on hosts limited to USB 3.2 Gen 1 (5 Gbps) or on devices outside the supported Windows 11, macOS 15+ or Linux kernel 5.17 environments.

How it compares

Measured against everything we stock in USB Cords & Extension Cables, at today’s prices. Recalculated every night.

Price $63.99
Pricier than about 90% of the 15,227 comparable items (median $14.99).

Specifications

Product
Brand nameUgreen
Model name35921
Product colorSpace Gray
Performance
Rated speed5 Gbit/s

Questions about this item

Will the 5 Gbps adapter saturate my existing Gigabit switch or do I need a 2.5 Gbps or 5 Gbps switch to see any benefit?

The adapter negotiates down to 2.5 Gbps or 1 Gbps automatically, so it works with your current switch; you only need a 2.5 Gbps or 5 Gbps switch and a CAT6 or higher cable to reach the 5 Gbps ceiling.

How can I verify the RTL8157 chip is running at 5 Gbps after I plug it into a Thunderbolt 3 port on Windows 11?

Install the Realtek driver from the included guide, then check the adapter speed in Windows Network settings — it should read 5 Gbps when linked to a 5 Gbps switch with a CAT6 or better cable.

Does the 35921 package include a CAT6 cable or do I have to buy one separately to hit 5 Gbps?

The box contains only the 9.4 cm aluminium adapter and a driver guide; a CAT6 or higher Ethernet cable must be purchased separately to achieve 5 Gbps.

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