not as bad as in naples. But you should be able to set that in the BIOS. this should only have bad effects in special applications because EPYC has a lot of L3 cache.Rome.
what have yo expected ? with interleave on the upper 96GB is three channel RAM.To be fair, it also ran four times slower with just channels ACEG populated so I think something else is going on there...
its AMI BIOS. the interleaving is AMD stuff. pls make some Memory-bandwidth tests with AIDA64.Makes we wonder whether Supermicro is doing something wonky with interleaving with anything less than 8 channels