You might have some luck reseating the ram after cleaning the contacts with isopropyl for single bit errors

If the errors are in the same address range everytime you can definitely reserve that address range in kernel parameters and nothing will be assigned there, you just lose a small amount of memory (Windows can do this too but I can't remember the process)

Last ditch effort is to manually adjust your ram timings, take note of what tests your ram fails on because there will be a corresponding setting for certain issues, this is very time intensive though and requires days of memtesting