BigTreeTech, primarily known for its 3D printed accessories, has released the Raspberry Pi CM4. (opens in new tab) alternate board.Devices reported by CNX software (opens in new tab), uses exactly the same form factor as the Compute module, but downgrades the specs. Still, if you’re looking for a low power board for IoT or any other product that needs the kind of his IO that CM4 can provide, this looks like a reasonable replacement.
There is also a carrier board that converts to a full-fat Pi 4 B style (opens in new tab) Although it is a board, the actual specs look weaker than the real thing. It’s powered by an Allwinner H616 quad-core Cortex-A53 SoC running at 1.5 GHz, a Mali-G31 MP2 GPU, and 1 Gigabyte of RAM. So DDR3 RAM. It might not compare to the tiny powerhouse that is the Pi 4, but it might be good enough for NAS and other low power computing projects.
CB1 decodes up to 4K/60 video and displays it through a single HDMI port on the carrier board. It can communicate using Wi-Fi 4, or 100Mbps Ethernet via carrier, and the two board-to-board connectors are close enough to those of his CM4 to be compatible with accessories made for more powerful modules. It measures 55 x 40 x 4.7mm, which is, as you might guess, the same as the CM4.
It also has good software support and you can download Debian Linux images. Github (opens in new tab)This is the version of Bullseye, the distribution that powers the official Raspberry Pi OS, and uses kernel 5.16, so it’s not particularly outdated, but the chipset is supported by the new 6.0 Linux kernel. I’m here. (opens in new tab).
Performance should be similar to the never-released Raspberry Pi 3 in the CM4 form factor. Instead, it appears as a DIMM-like board with broad edge connectors. CB1 is available from the Biqu store. (opens in new tab) Around $40 for a bundle with a Pi adapter. It has not yet appeared on BigTreeTech. AliExpress Store (opens in new tab).