I have a Supermicro H11DSi Ver.2.0 with 2 x 7001 series CPU's.
When populating all dimm slots with SK hynix (32GB/2Gx4 DDR4) 2400MHz PC4-19200 ECC/REG CL17, the computer will not boot. with 8 modules everything boots fine.
The modules are working , been tested one by one.
