Single-board computer maker Radxa has introduced a new computer-on-a-module featuring a Rockchip RK3566 processor and support for up to 8GB of RAM and 128GB of eMMC storage.

It’s called the Radxa CM3 and if the name sounds familiar, that’s because this 55 x 40mm module is designed to be a drop-in replacement for Raspberry Pi’s Compute Module 4.

If you’re wondering why you’d want this alternative to Raspberry Pi’s compute module, it’s not necessarily for CPU performance. The Raspberry Pi CM4 has a 1.5 GHz BCM2711 quad-core ARM Cortex-A72 processor which should provide a little more horsepower than the 2 GHz ARM RK3566 quad-core ARM Cortex-A55 processor in Radxa’s model.

But Radxa’s board may still be more versatile in a few key ways:

  • Neural network acceleration engine with up to 0.8 TOPS performance
  • Support for peak eMMC bandwidth up to 250 MB/s (rather than 100MB/s)
  • 2 SATA connectors (one shared with a USB 3.0 connector, the other with PCIe 2.0)
  • While it supports only one HDMI port (compared with two for the Raspberry Pi CM4), but adds a eDP support and dual MIPI-DSI connectors.
  • There are 50 GPIO pins compared with 28 for the Raspberry Pi model.

Radxa says it’s tested its new module with multiple carrier boards designed for the Raspberry Pi CM4 and found that they work well without any modifications. But since the Radxa CM3 has some features the Raspberry Pi CM4 lacks, you may need an additional board to take full advantage of them.

Radxa CM3 half mini ITX carrier board

Or you can buy one of Radxa’s carrier boards. The company will offer a compact 65 x 56mm E23 board with dual Ethernet ports, USB 3.0 and USB-C and A/V ports, and a half mini ITX-sized board that measures 170 x 85mm and features more ports, breakout pins, and much more. Radxa says it should fit in a standard ATX case.

Radxa CM3 E23 carrier board

While Radxa hasn’t announced a release date for its CM3 yet, developers interested in can apply for a chance to get a free beta hardware kit. When the CM3 does go on sale, prices are expected to range from $25 for a model with 1GB of RAM, no storage, and no wireless capabilities to $90 for a version with 8GB of RAM, 32GB of storage and support for WiFi 5 and Bluetooth 5.0.

The company is promising long-term availability, with a guarantee that you’ll be able to purchase the device through at least September 2029.

via Radxa Community and CNX Software

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One reply on “Radxa CM3 is an RK3566-powered drop-in replacement for a Raspberry Pi CM4”

  1. i need similar board but in feather format (like Orange Crab)
    and with lipo

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