Have 128gb RAM but I can't even use 10% of it

Given the way Samsung printed the part number - there is not much way for you to know that the main part number ends in BH0 (BH zero) - instead of ending in the letter "o". Samsung Computing DRAM Product Catalogue | Samsung Semiconductors Global Site

M393B2G70BH0 << Google search

It is often referred to as server memory because it is ECC. (Crucial.com - What is ECC server memory?) Most general purpose computers do not use ECC memory. Scary, isn't it?

As far as I know, all high-end Dell T series workstations use ECC RAM.

You can run Crucial's scanner...
Crucial.com - Crucial System Scanner
...and see if it correctly sees all of the occupied slots.


I think we know why this computer was for sale :-(
There is something very weird about it.


If you get desperate enough, ground yourself and carefully reseat each stick of RAM.

Yes the motherboard is supposed be a dual processor board. The motherboard specs list the memory as "16 DIMM slots (8 per processor)" so I took that to mean the 8 RAM slots that are currently used are dedicated to only serve processor "A" and if a processor "B" was added then it would only use RAM in the other 8 slots.

Perhaps memtest those? Would take a week for 8 passes with so much mem though

RAM - Test with Memtest86+

Perhaps remove all but 2 and work your way up from there if all is good.