The Radxa ROCK4C+ is one of several boards positioned as a Raspberry Pi alternative — worth considering if you've hit stock shortages, want onboard eMMC storage, or just want a second option that drops into the same form factor and GPIO layout. This post covers what you're actually getting if you go this route: where the ROCK4C+ holds up against the Pi 4 and where it doesn't, and how to get Radxa OS installed and accessible from a blank microSD card.

Here's how the ROCK4C+ measures up against the board it's positioned to replace — the Raspberry Pi 4 Model B. Only specs that could be confirmed against official documentation or direct user reports are listed below; anything uncertain or inconsistently reported across sources has been left out rather than guessed at.

If the specs above make the ROCK4C+ worth trying, here's how to actually get it booted and reachable — flashing Radxa OS (Debian 12 Bookworm) and getting to a headless SSH session. You'll need a microSD card, a monitor and keyboard for one step, and a network connection.

1. Go to the official Radxa releases page: github.com/radxa-build/rock-4c-plus/releases
2. Download the latest stable Radxa Debian 12 (Bookworm) image — avoid pre-release builds.

1. Flash the downloaded .img file to a microSD card using a tool like Balena Etcher or Raspberry Pi Imager.
2. If the flash fails partway through, the card will report that it needs reformatting — this is almost always a partially-written partition table rather than a damaged card, and a clean re-flash resolves it.

1. Insert the microSD card into the ROCK4C+.
2. Attach an HDMI monitor and a USB keyboard directly to the board, and plug in an Ethernet cable. You need the monitor and keyboard for this step only — SSH isn't turned on yet, so this is the only way to reach the board right now.
3. Power on the board and wait for it to boot to a login prompt on the screen.
4. Using the attached keyboard, type the default username and password below and press Enter after each: radxa / radxa.

Still on the monitor and keyboard from Step 3, type the following commands one line at a time (or paste all four lines at once — each line runs automatically as soon as the previous one finishes), pressing Enter after each:

sudo apt update && sudo apt install -y openssh-server
sudo systemctl enable --now ssh
sudo systemctl is-enabled ssh
hostname -I

The last command, hostname -I, prints the board's IP address on screen — write it down. That's the last thing you need the monitor and keyboard for. Once this runs successfully, you can disconnect both and move to your everyday computer for every step after this one.

With the monitor and keyboard unplugged, open a terminal program on the computer you normally use — not the ROCK4C+ itself:

• Windows: open PuTTY, enter the IP address from Step 4 as the "Host Name", leave the port as 22, and click Open.
• Mac or Linux: open the Terminal app and type ssh radxa@<the IP address from Step 4>, then press Enter.

1. Enter the password you set in Step 3 when prompted.
2. If you get "connection refused" instead of a password prompt, SSH likely isn't enabled yet — go back to Step 4 with the monitor and keyboard reattached.
3. Once connected, set a DHCP reservation in your router tied to the board's MAC address (from ip a) so the IP doesn't change on reboot.

From here on, every command in this post — including Step 6 below — gets typed or pasted into this SSH terminal window, the same way you would in Step 4: paste the text, then press Enter to run it.

Still in the SSH terminal from Step 5, paste this block in and press Enter to confirm the OS actually booted correctly and sees the hardware as expected:

cat /etc/os-release
uname -a
nproc
free -h
df -h
uptime

You're now ready to put the ROCK4C+ to work on different applications. Browse CreateLabz's website for sample projects you can use as a starting point or reference for your own build.