Two years of life
Motherboard bought in September 2018, burnt out in October 2020.
I still don't know where it came from, a visual inspection revealed no warped/unsoldered/burnt components. There was no smell of burning. Nothing. It just died almost exactly two years after purchase.
Symptoms: A CPU fan that sizzles when the power is turned on and off but stays still the rest of the time, everything else seems to work normally (the graphics card fan behaves normally, for example), except that the CM doesn't respond to an 8-second press of the power button, and nothing connected to it seems to respond (keyboard (USB), mouse (USB), headphones (jack), display (HDMI)).
The physical environment around the box was as stable as could be (it was just me at my desk). The power supply was behind an on-line inverter. This is simply inexplicable.
Otherwise, the BIOS interface was slow, but still drinkable as long as you don't mess with the CPU configuration options (unorthodox option naming), or the advanced power options (incomprehensible interface). Negative point: no TPM extension possible. I've never used Wi-Fi or Bluetooth, so I can't comment on these options, but the supplied antennas are discreet and robust, so I re-used them instead of those supplied with the Gigabyte B450 I AORUS PRO WIFI (which I took as a replacement).
Other details, but not related to the CM itself:
* The temperature and fan speed sensors are not properly supported under Linux (Nuvoton chip already registered, but AsRock specific version?)
* Sound controller support under Linux is unacceptable. The outgoing sound is of poor quality, and the incoming sound simply crackles.
