I have two kits of 2x16GB BLS16G4D32AESB.M16FE RAM. D.O.C.P enabled.
All the RAM gets detected and I have been runing Blender without issues. The moment I launch Apex Legends my PC just shuts down. This also happens if I run PassMark Memtest from a bootable USB.

Kit#1 - Slot #1 and #3
Kit#2 - Slot #2 and #4
0 errors in Memtest and ApexLegends but system just suddenly randomly shuts down like if a power was lost.

Kit#1 - Slot #1 and #2
Kit#2 - Slot #3 and #4
0 errors in Memtest and ApexLegends but system just suddenly randomly shuts down like if a power was lost.

Kit#1 - Slot #1 and #3 and then #2 and #4
Kit#2 - removed from PC
Everything works fine, I managed a whole pass trough the Memtest with 0 errors and DOCP enabled. Apex Legends also runs fine.

Kit#1 - removed from PC
Kit#2 - Slot #1 and #3 and then #2 and #4
Everything works fine, I managed a whole pass trough the Memtest with 0 errors and DOCP enabled. Apex Legends also runs fine.

Kit#1 - Slot #1 
Kit#2 - Slot #2
(slot #3 and #4 empty)
Everything works fine, I managed a whole pass trough the Memtest with 0 errors and DOCP enabled.

I really have no clue on whats going on. The RAM is definitely fine since it managed to pass the Memtest without any errors even with DOCP enabled. If I disable DOCP and let RAM run at 2400MHz I have a very bad performance in games and I have let it run for about 40min in Memtest and experienced no shut downs.
I also tried manualy tweaking RAM clocks and I cant even get 3000Mhz with the 3200MHz DOCP timings run without shuting down my system.

(x570 Crosshair Hero VIII Wi-Fi and R9 3900X)

any clues?