Quick Specs

Memory
DDR4-2133 ECC Registered DIMMs Option Kit Part
Number
Support Notes
CTO 4GB DDR4-2133 ECC Registered RAM J9P81AA 1,2
8GB DDR4-2133 ECC Registered RAM J9P82AA 1,2
16GB DDR4-2133 ECC Registered RAM J9P83AA 1,2
32GB DDR4-2133 ECC Load Reduced (LR) RAM J9P84AA 1,2
NOTES:
Identical memory components are used to build the CTO configurations as are available as After Market
Options (AMO). The AMO Option Kit Part # are shown alongside the memory DIMMs
For details on the supported memory configurations on the HP Z840 Workstation, please refer to the
System Technical Specifications - System Board section of this document.
DIMMs should be equally distributed across all four memory channels for optimal performance.
Each processor supports up to 4 channels of DDR4 memory. To realize full performance at least 1 DIMM
must be inserted into each channel.
The CPUs determine the speed at which the memory is clocked. For example, if a 1600MHz capable CPU is
used in the system, the maximum speed the memory will run at is 1600MHz regardless of the specified
speed of the memory.
You cannot intermix LR DIMMs with Registered DIMMs. The system will not work.
Maximum memory capacities assume Windows 64-bit operating systems or Linux. With Windows 32-bit
operating systems, memory above 3 GB may not all be available due to system resources.
Multimedia and Audio Devices
Factory
Configured Option Kit
Option Kit
Part
Number
Support
Notes
HP Thin USB Powered Speakers N Y KK912AA
Integrated IDT 92HD94 Audio Y N NA
QuickSpecs
HP Z840 Workstation
Supported Components
DA - 15098 Worldwide QuickSpecs — Version 3 — 11/1/2014 Page 11