rockchip

Recently Joshua Riek posted he's dropping off from GitHub. If you haven't heard of him, he's one of the few reasons working with Linux on Rockchip SBCs is so much easier today than it was just a few years ago.

His Ubuntu Rockchip distribution is built for Ubuntu 22 and 24, and they've been maybe the most popular and stable way to run Ubuntu on Rockchip devices.

So popular, in fact, that manufacturers who use Rockchip, like Turing Pi, build their own official images on top of Joshua's.

Now, if you're reminded of XKCD #2347, yeah, I am too.

Radxa's Rock 5 model B is an ARM single board computer that's 3x faster than a Raspberry Pi. And that's just the 8-core CPU—with PCI Express Gen 3 x4 (the Pi has Gen 2 x1), storage is 7x faster! I got over 3 GB/sec with a KIOXIA XG6 NVMe SSD.

It's still half as slow as modern ARM desktops like Apple's M1 mini, or Microsoft's Dev Kit 2023 (see my review here). But it's way faster than a Pi, it comes with 2.5 Gig Ethernet, it has two M.2 slots on board... and, well—it also starts at $150!

Since the Raspberry Pi was introduced, hundreds of clones have adopted the Pi's form factor (from the diminutive Zero to the 'full size' model B). Often they have better hardware specs, and yet they remain a more obscure also-ran in that generation of Single Board Computer (SBC).

So when I saw Radxa's CM3 and Pine64's SOQuartz, I wanted to see if either would be—as they advertised—'drop in, pin-compatible replacements' for the Raspberry Pi Compute Module 4.

tl;dr: They're not. At least not yet.

Hardware and Specs

Both boards are technically pin-compatible. And both will boot and run (to some extent) on pre-existing Compute Module 4 carrier boards, including Raspberry Pi's official IO Board: