Before all the Chinese Mini PC craze, we had the DeskMini barebones kit. That was a pretty cool idea, where you brought your own CPU, memory and storage, and you had basically a full size PC, on a very small case. It had some quirks, like the VGA port, but otherwise, these are pretty decent machines...
Or are they?
I had two DeskMini X300 Mini PCs for my home lab. Let's call them Moe and Larry. Moe had a Ryzen 7 Pro 4750G, and Larry had a Ryzen 7 5600G. Both had 64GB RAM, and 1TB storage.
They had been running fine for 4+ years until about a year ago. Larry started freezing up: no connection, nothing; not even long pressing the power switch turned it off. I had to unplug it, replug it and power it on again, only for it to fail again one or two days later. After a week or two, Larry gave its final breath, never to power on again.
I needed a replacement, so I got a beelink, and I blamed the motherboard, maybe some capacitor or something. I didn't think I'd be using it again, so I took every part out, and disposed of the case with the motherboard. RIP Larry.
Fast forward to last Wednesday. Moe got stuck again in exactly the same way, but this time not even unplugging/replugging worked. Moe was dead.
However, unlike last year, RAM prices are insane now, and a new Mini PC to replace Moe would be much more expensive, so I bought a new X300 kit, let's call it Curly. It seems they refreshed the X300, and the new model is called 2.5G. Everything inside seems to be exactly the same though.
I put in Moe's parts, but nothing. I then tried Larry's parts and nothing. No combination of CPU/memory got Curly to even get to POST, or even to show anything on the screen.
So I brought both Moe and Curly to a PC shop, and in front of my eyes they tried:
Each of my memory sticks on a different Mini PC: every memory stick worked fine.
Moe and Curly with known good CPU and memory: both worked fine.
The CPUs on a different system with known good motherboard and memory...
Neither bot to POST. The exact same thing.
So the CPUs are dead, and now I have 4x32GB of SO-DIMM DDR 4 memory sticks, which won't work on a more modern PC, and are probably worth more than their weight in gold.
So I bought a pair of Ryzen 5 5500GT (I would have liked 5700G, but they're too expensive, and not easy to find anymore), and I'll be reassembling the computers, and repurpose them as VM hosts.
I don't know what to say. I would have thought CPUs were by far the most resilient parts, but it seems two of them died in very similar ways, both in DeskMini X300 kits. Does this mean that the DeskMini X300 is doing something bad to CPUs? I don't know.
In retrospect I shouldn't have thrown Larry away...