At the moment, all seems ok. Had the BIOS updated to the last version few weeks ago. At the same time added another 16GB 8pack 3200 and still, no nasty surprises.
The processors, without any adjustments, is running cooler than the 1600x, and under over a hour stress testing, was at high 40s C. It's water cooled, but at the exactly same setup, I was getting mid 50s with the 1600x.
Another thing is, the PCH was way hot for my liking before, and still was. Despite good airflow, even with a fan closely pointed at it, was at mid 40s, and without the fan would go mid 50s. Replaced the thermal pad for the 1mm gelid gp extreme, which is rated at 12w/mk. Temperature now at mid 30s.
VRM still running as cool as before.