Memory Warning 17-1 at HP Z8 G4 after Memory Update

[M-J-Caboose]

Hi,

I tried to upgrade my hp Z8 from 128GB to 384GB.

Originally there have been installed 8 SAMSUNG modules "M393A2K40CB2-CTD". (16GB ea.)

Now I added 16 original HPE Part-# 840756-091 (SK hynix) (also 16GB ea.)

When starting the machine I get a BIOS warning:
"Warning 17-1 occurred on CPUx-DIMM4 during memory initialization".

This applies to CPU0, DIMM 2, 4, 9, 11 and CPU1, same DIMM 2, 4, 9, 11 ... The memory size still is 128GB, but now using 8 of the SK hynix modules.

Strangely enough, when I remove exactly those 8 DIMMs I get a memory change warning to 256 GB ... Even though this memory configuration is not valid according to the manual ... I didn't check on speed/performance, but memory test works fine.

So I tried the following configurations (always identical for CPU0 and CPU1) ...

1.) 8 Modules in DIMM 1, 3, 10, 12 (128GB, Configuration I bought the machine with, supported by Manual Memory table)

2.) 12 Modules in DIMM 1, 3, 5, 8, 10, 12 (192GB, supported by Manual Memory Table)

3.) 16 Modules in DIMM 1, 3, 5, 6, 7, 8, 10, 12 (256GB, not listed in the Memory Table of the manual)

4.) 24 Modules in all 12 DIMM Slots of each CPU (384GB, supported by memory table, but System only recognizes 128GB, Warning 17-1 issued)

It does not really matter which modules I choose. If I fully populate the DIMMs I get the message. I swapped the modules as well to make sure that there is no faulty one.

I was not able to find much about this warning in the manual nor in the Internet.

Any guesses?

Best wishes,

Armin

PS: I also upgraded the BIOS to the latest version and cleared the settings ... still same behaviour.