Hi folks,
albeit the board has been deprecated in coreboot 4.11, I wanted to contribute a working RAM setup for all who still use it. I managed to run a KGPE-D16 with a single CPU (Opteron 6380) and 96 GB of RAM and the following LRDIMMs:
orange slots: 4x Samsung 16 GB DDR3L reg ECC (M393B2G70BH0-YK0) black slots: 4x Samsung 8 GB DDR3L reg ECC (M393B1K70DH0-YK0)
Using full 128 GB with the 16 GB modules resulted in ECC errors during memtester runs (and under heavy load). Also, I was not able to get a configuration with 96 GB using only 16 GB modules running - neither by the configuration described as problematic in the Wiki (leaving the slots next to the CPU empty) nor using the configuration desribed in the user manual (leaving the slots B1 and D1 empty.
I tested the "working so far" configuration with memtester (running aprox 10 minutes) and by compiling AOSP for about one hour with 80 GB allocated to the VM where the compilation is running. No entries about ECC-recovered hardware errors and such in syslog so far (unline the previous run when I had 128 GB in the machine).
Btw.: For me, it would make sense to have a section in the documentation about boards that were previously supported in coreboot such as the KGPE-D16 that is currently missing there.
Cheers, Daniel
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Daniel Kulesz