Mac Pro Late-2013 (a.k.a. "TrashCan") - identifying which DIMM is where

[JAustin]

I'm running 9.4 (1000) Free on a Mac Pro Late-2013 (a.k.a. "TrashCan") with 64 GB and the latest release firmware. MemTest86 returns multiple ECC errors, which are of course being corrected. Knowing they're there bothers me, though, so I want to swap out that DIMM. The result screen shows the errors in "Channel/Slot: 0/0." Everywhere else I've found so far in MemTest86 uses Apple's numbering (slot numbers 1-4). How do I map Channel/Slot to Apple's labels so I can figure out which DIMM to replace?

[David (PassMark)]

Some memory controllers don't return any valid channel / slot information for ECC corrections.

Try rotating the sticks and see if the 0/0 value changes.