Can you do a maxxmem2 run when you have finalized the timings ?My 5600x rig has the 3200 CL14 G.Skill 16GB kit.
3866/1933 1.5v's currently CL16 1t GDM disabled with zero WHEA errors so far. Haven't tightened all the timings yet, but it does look promising so far. I'm treading cautiously on timing. If I can get CL16 good to go I'm shooting for CL15 next.