Well I think I finally found the problem, XMP does not work on my G.Skill TridentZ 3600MHz CL15 (2x8 GB Dual channel) and yes they are on the QVL.
When I turned it to the default 2133MHz (CL 15 15 15 36) I was able to play Assassins Creed Origins for an hour with no problems (except my frames are now lower than they were of course) They do however pass every single test / benchmark I could throw at them like aida64, prime95 and windows memory diagnostics, but every time I tried to play games they would just crash to desktop after 5-20 minutes every single time.
I was able to run them on XMP on 0505, but then the heat on CPU became the problem of course since it was running on over 1.412 vcore volts..
Hopefully this will be fixed in a future update
🙂Model: F4-3600C15D-16GTZ
Ean: 4719692009890
http://gskill.com/en/product/f4-3600c15d-16gtz