MB: Asrock Pro4 Z370 (bios 1.7\1.5)
RAM: CMK16GX4M2B3000C15R ver 5.39
If you have installed both modules in memtest start getting errors on 4527m it in the 5th test, and they can start to climb immediately and say 50 run. For the test did 1000 runs in other areas of memory - no errors.
When testing one module there are no errors, drove for 18 hours each. Slots, dual\single channel, overclocking and BIOS have no effect. The visual memory of the mother and the socket is undamaged, the memory is in the QVL but it my version (5.93) no.
Problem 3 months but was able to catch memtest now only because the first memtest 4 hours gave nothing but body was rare. The work appears random Badami with a periodicity of 15 days to a couple of minutes.
May be someone faced with similar? I sin on mother, but who knows.