Radxa ROCK 3B Rockchip RK3568 SBC combines Pico-ITX and Raspberry Pi form factors
Radxa ROCK 3 Model B, or ROCK 3B for shorts, is a “PI-CO ITX” SBC powered by a Rockchip RK3568 SoC that combines the benefits of Pico-ITX and Raspberry Pi form factors in the sense that the 100x72mm board features all main ports on the rear side and supports expansion through a 40-pin Raspberry Pi-compatible GPIO header and several M.2 sockets for storage and wireless modules.
The ROCK 3B is the younger, but bigger brother of the ROCK 3A business card-sized SBC introduced in 2021, still with an RK3568 CPU and up to 8GB LPDDR4, but the board features two gigabit Ethernet ports, an M.2 B Key socket for 4G LTE/5G cellular modules, an M.2 PCIe 3.0 x1 socket for an M.2 2280 SSD not necessitating an expansion board, besides the M.2 Key-E socket for WiFi 6.
Radxa currently provides Debian 11 “Bullseye” and Ubuntu 22.04 “Jammy” images for the Rock 5B board, but Android 11 should also be officially supported, plus third-party from Armbian and others should eventually be released. You’ll find a getting started guide, OS images for download, additional hardware information, and instructions to use a 4G LTE module, a MIPI DSI display, the PoE HAT, and more in the wiki.