I'm running ubuntu 18.04 with latest drivers 19.10 and kernel 4.15.0-48-generic.
I'm experiencing hard reboot while heavy Load on gpu. There is absolutely no System log since it look limes NMI.
Reboot happends with a gpu Power draw of 80w or 200w either (with Radeon VII).
This only happends under linux, I've tried to reproduce under windows but this never happends.
I have also tried 18.50 drivers with exactly same results.
I've also tried kernel 4.18, and 5.1 same behavior.
Before Radeon VII I was using 2x Rx580 running a 100w of constant power draw(each) never experience reboot like this before switching to new Radeon VII.
Thanks in advance
Finaly I got same behavior on windows running openCL stress test. Same while playing The Division 2. Seems to be the GPU the faulty.
FInaly it was too much dust in the PSU. Big clean up and issue is gone...
Thanks to all for helping