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ROCK3 Model C board starts at $39.00

Mar 15, 2023 — by Giorgio Mendoza 845 views

The Rock 3 Model C is another single board computer powered by the Rockchip RK3566 with 0.8 TOPs NPU. Radxa’s new SBC supports up to 8GB RAM, 128GB eMMC and it can be powered with PoE HATs.

The Rockchip RK3566 System-on-Chip was recently seen on the URVE Board Pi SBC launched last month.


  • RK3566 — Quad-core Cortex-A55 (up to 1.6 GHz); Arm Mali-G52 EE GPU; 0.8 TOPS NPU

RK3566 block diagram
(click image to enlarge)

The Rock 3 Model C features an HDMI port with 4Kp60 resolution and a MIPI DSI connector, but the Wiki states that the SBC doesn’t support dual simultaneous displays.

Rock 3 Model C peripherals
(click image to enlarge)

The ethernet port supports PoE (Power-over-Ethernet), with an additional PoE HAT. Radxa also mentions that this board is mechanically compatible with “many of the existing Raspberry Pi 4 accessories”.

The Getting Started page indicates that the Rock 3 Model C can boot up from the eMMC module or from a microSD card. The Downloads page currently lists images (Pre-release) for Debian Bullseye and Ubuntu Server 20.04.

Rock 3 Model C bottom view (left) and top view (right)
(click images to enlarge)

The 40-pin expansion header provides access to 5x UART, 1x SPI, 2x I2C, 6x GPIO, 1x ADC, 6x PWM, 2x 5V pins and 1x 3.3V pin.

The company recommends using a 5V/3A power supply when using an SSD device so the board might not ship with a power supply adapter.

Specification listed for the Rock 3 Model C:

  • Memory/Storage:
    • Up to 8GB LPDDR4 
    • Up to 128GB eMMC
    • 1x SD Card slot
  • Expansion:
    • 1x M.2 2230 (NVMe SSD or SATA SSD)
  • Display/Audio:
    • 1x HDMI 2.0 port
    • 1x 2-lane MIPI DSI 
    • 1x 3.5mm Audio jack
    • HD codec (up to 24-bit/96KHz audio)
  • Camera:
    • 1x 2-lane MIPI CSI
  • Connectivity:
    • 1x RJ45 GbE LAN
    • WiFi 5 (802.11 ac)
    • Bluetooth 5
  • I/O Interfaces:
    • 40-pin GPIO expansion header
  • USB:
    • 1x USB 3.0 HOST port
    • 1x USB 2.0 OTG port
    • 2x USB 2.0 HOST port
  • Other Features:
    • 1x Power button
    • RTC
    • PWM fan header
  • Power:
    • 5V DC (via USB Type-C)
  • Mechanical:
    • 85 x 56mm

Further information

The 1GB RAM model is available for $39.00 while the 2GB variant costs $44.00. The 4GB and 8GB RAM variants are not available yet; these two boards cost $54 and 74 respectively. See the Rock 3 Model C product page for more details.

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2 responses to “ROCK3 Model C board starts at $39.00”

  1. PuceBaboon says:

    $44 for the 2GB

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