placed in my system some OEM b-die was able to boot them at 3600 but they were not stable (MFR was not able to boot at 3600)
https://www.samsung.com/semiconductor/dram/module/M378A2K43BB1-CPB/
i loaded 4 stick of memory 3 b-die and 1 MFR (see post above) set all 3200 they all seam to work fine...
modules with 4 ranks can get to 32G,
the motherboards (expensive ones) with 2 dimm slots are made specifically for overclocking where i think you want single rank modules 2x 8G single rank modules , you don't need much RAM to set a record
for average Joe you have 4 dimm slots and that can get...
AFR, MFR, B-Die...
Some theory , price , ROI
so Hynix, Samsung,Micron ... make memory chips and they sell also their own memory sticks
example https://www.samsung.com/semiconductor/dram/module/M378A2K43BB1-CPB/
DDR4 2133CL15, can we get worst than that those days? but than they are making those...