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QuickSpecs
HP Z840 Workstation
System Technical Specifications
c04400043 — DA – 15098 — Worldwide — Version 8 — April 1, 2015
Page 17
Memory Loading Order:
Load Order for Single Processor Configuration
Load Order for Dual Processor Configuration
Maximum Memory
Supports up to 256GB using RDIMMs
Supports up to 1024GB using LRDIMMs
Supports up to 2048GB using LRDIMMs
Memory Configuration
(Supported)
Not all memory configurations possible are represented. Not all memory
configurations shown are available as CTO. Please check Ordering Guide for
supported configurations.
Only ECC DIMMs are supported.
RDIMM (Registered) and LR DIMM (Load Reduction) memory cannot be mixed. All
memory installed in the system must be either RDIMM or LR DIMM.
Do not install memory modules into memory slots if corresponding processor is not
installed.
Dual processor configurations with memory modules installed for only one
processor is not supported.
Notes
Please refer to the table above for details on how supported memory configurations are
installed in your system.
* For 32 bit operating systems, there is a memory limit of 4GB.
~ Although technically possible, these configurations are not available to order at this time.
The Z840 will support up to 512GB at initial release.
The Z840 will support up to 1024GB when 64GB DIMM support is added following initial
Z840 release.
The Z840 will support up to 2048GB when 128GB DIMM support is added following initial
Z840 release.
PCI Express Connectors
Two PCIe Gen3 x16 with latch
One PCIe Gen3 x16 with latch.
Enabled only with optional 2nd CPU is installed.