HP Z440, Z640, and Z840 Workstation Series - Maintenance and Service Guide

Memory
Supported DIMM congurations
NOTE: Mirroring and DIMM sparing are not supported.
Platform Conguration
HP Z440
●
Eight DIMM slots
●
Registered ECC DIMMS only
●
Maximum capacity: 128 GB
HP Z640
●
Four DIMM slots (single processor) or eight DIMM slots (dual processor)
●
Registered ECC DIMMS and ECC Load Reducing DIMMs
●
Maximum capacity:
—
RDIMMs: 64 GB for single processor and 128 GB for dual processor
—
LRDIMMs: 128 GB for single processor and 256 GB for dual processor.
●
The workstation can be congured for NUMA
HP Z840
●
16 DIMM slots (8 per processor)
●
ECC Registered DIMMs and ECC Load Reducing DIMMs
●
Maximum capacity:
—
RDIMMs: 128 GB for single processor and 256 GB for dual processor
—
LRDIMMs: 1024 GB for single processor and and 2048 GB for dual processor
●
The workstation can be congured for NUMA
BIOS errors and warnings
The BIOS generates warnings/errors on invalid memory congurations:
●
If the BIOS can nd a valid memory conguration by disabling plugged-in memory, it does so and
reports a warning during POST. the workstation can still be started. The warning will indicate the
location of the failed DIMM on the system board.
●
If there is no way for the BIOS to obtain a valid memory conguration by disabling plugged-in memory,
the BIOS halts with a diagnostics 2006 code for memory error (ve beeps and blinks).
DIMM installation guidelines
●
Install only HP-approved DDR4 DIMMs
CAUTION: HP ships only DIMMs that are electrically and thermally compatible with this workstation.
Because third-party DIMMs might not be electrically or thermally compatible, they are not supported by
HP.
●
Install only HP-approved DDR4 DIMMs. See http://www.hp.com/go/quickspecs to nd DIMMs that are
compatible with the workstation.
●
UDIMM (Unbuered), RDIMM (Registered) and LR DIMM (Load Reduction) memory cannot be mixed. All
memory installed in the system must be either UDIMM or RDIMM or LR DIMMs.Supported DIMM
congurations on page 65species which technologies are supported on each platform.
Component replacement guidelines 65