Radxa Zero 3W

Overview

The Radxa Zero 3W is an ultra-compact single-board computer built around the Rockchip RK3566 quad-core Cortex-A55 SoC with a Mali-G52 GPU. Roughly the size of a credit card, it targets IoT deployments, embedded Linux projects, and applications where board footprint is a primary constraint. It is available with 1 GB, 2 GB, or 4 GB of LPDDR4 RAM, along with eMMC and a microSD slot for storage.

Wireless connectivity is provided by an onboard WiFi 5 (802.11ac) and Bluetooth 5.0 module. The board intentionally omits a wired Ethernet port, keeping the form factor minimal. USB-C provides both OTG data and 5 V power. The companion model Radxa Zero 3E offers a similar layout with Gigabit Ethernet via the USB-C port instead of WiFi.

Armbian supports both mainline and vendor kernels for the Zero 3W, offering Desktop and minimal/IoT images based on Debian and Ubuntu. The board is a popular choice for wireless sensor nodes, headless media clients, and portable Linux projects that benefit from the small physical footprint.