“I bought a 16GB CM5 (emmc version) to go into an Argon40 One Up and it's currently working great! One thing that I didn't realize is that the emmc chip occupies the same lanes as the SD card so if you're buying one for the Argon One Up, make sure to get the Lite version of the CM5 (no emmc) if you want to be able to use the SD card slot”
