Updated the OP with the Walmart deal. Just in case it comes back in stock again. It is a steal at $399+tax.
Wanted to update on alternate hardware configs too.
I have confirmed the Athlon 3000g works perfectly with this Erica board. It properly displays it as a Athlon 3000g in the bios too. Popped the battery for 30 secs, and on boot it took a little to "train" then it was fine. And both the CPU and iGPU are overclockable using Ryzen Master. Right now 3.7GHz CPU, and 1350MHz iGPU. This is my first try on this setup, hence the conservative settings. Based on the last 3000g I had, should be another 100MHz or more headroom on both. Ran Heaven bench fine, next up is 3DMark stress test.
Being a 35W APU, the cheesy cooler handles it easily. I am using a graphite thermal pad with it and so far temps don't break mid 50s even with the basically silent fan speed.
The 2x8GB 3000 ram kit still runs its rated speed after one reboot. First time it runs 2133, next boot the XMP kicks in.
Only issue I had was it would not boot without a drive containing an OS on it. Gives 3 beeps, and requires a the 30 second CMOS clear to boot without the beeps. I tried various secure boot disabled, change boot order, enable legacy boot. It simply wouldn't boot without finding the OS boot manager. Anyone know how to get around that? Because I had to start the windows install on another system. Then when it gets to the stage where it has copied everything from the USB stick and does the reboot, turn the system off and put the SSD in the HP. At that point I can proceed normally.
Anyways, this thing's footprint is small enough that it makes for a nice HTPC setup. Particularly with how quiet it runs. I will probably play with it for another month or 2 then sell it off.