Getting 128GB to work with a desktop PC can be tricky. With modern processors incorporating memory controllers on die, the load from 4 DIMMS is problematic.
If anyone is interested in using 4 DIMMS, make sure to check the memory QVL for the motherboard you have and be prepared to spend some time tweaking the BIOS to make it work. Using memory that is not on the QVL may also work but will most likely need tweaking and loosening of the timings and speed.
I think I was getting about 450/620Pkeys/s on Ryzen 5950X/32GB with k=1440/2048 on #120
Would like to have 128GB on my system but that's impossible due some reasons