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ROCK 4A/4B Overview

ROCK 4A/4B is an SBC based on the RK3399 SoC, featuring a dual-core 1.8GHz Cortex-A72 and a quad-core 1.4GHz Cortex-A53 processor. It supports 4K display and offers outstanding performance along with rich interfaces. The ROCK 4A/4B offers professionals, industrial OEMs, IoT enthusiasts, hobbyists, PC DIY enthusiasts and makers a reliable and extremely capable platform for building and tinkering their ideas into reality.

4A close view


The appearance of the SBC may vary slightly depending on the version.


The difference between ROCK 4A and ROCK 4B is that ROCK 4A is equipped with onboard wireless module (Wifi&BT), while ROCK 4B is not equipped with onboard module, and other parameters are the same.

ProductROCK 4A/4B
CPURockchip RK3399, 64-bit processor
Dual-Core Arm® Cortex™-A72 @ 1.8GHz and Quad-Core Arm® Cortex‑A53 @ 1.4GHz
GPUMali T860MP4 GPU,support OpenGL ES 1.1/2.0/3.0/3.1/3.2,Vulkan 1.0,OpenCL 1.1 1.2,DirectX 11 etc
RAMLPDDR4, 2GB/4GB optioal
microSD:supports up to 256 GB
M.2 SSD (M.2 connector supports up to 2T M2 NVME SSD)
DisplayStandard HDMI 2.0 up to 4K@60
MIPI DSI 2 lanes via FPC connector
HDMI and MIPI DSI can work at the same time, support mirror mode or extend mode
Audio3.5mm jack HD codec that supports up to 24-bit/96KHz audio
CameraMIPI CSI 2 lanes via FPC connector, support up to 800 MP camera (1mm pitch connector)
WirelessROCK 4A is not equipped with wireless module
ROCK 4B is equipped with wireless module (Wi-Fi 5, Bluetooth 5.0), with external antenna connector
USBUSB 3.0 OTG X1, hardware switch for host/device switch, upper one
USB 3.0 HOST X1, dedicated USB 3.0 channel, lower one
EthernetGbE LAN with Power over Ethernet (PoE) support additional HAT is required for powering from PoE
PowerUSB PD 2.0 Support USB Type C PD 2.0, 9V/2A, 12V/2A, 15V/2A, 20V/2A
Qualcomm® Quick Charge™ 2.0 Support QC3.0/2.0 adapter, 9V/2A, 12V/1.5A
Size85mm x 54mm