I bought an Asus TUF gaming B550M-plus and coupled with a 3900X and 2 pairs of HX432C16PB3K2/16. The memory is on QVL for use in the 4 slots.
Well, when I got all 4 pairs in I got random issues (BSOD,etc), but nothing caught on Memtest86 when running for 30min.
Then I decided to test each ram on each slot. I could get many configurations to POST with DOCP profile (A2-B2,A1-A2-B2, only A1, only A2, only B2), except when there was any memory on slot B1.
When testing with RAM only on B1, I swapped the RAM with all identical 4 DIMMs that I had and still didn