8GB DDR3-1600 ECC Registered RAM
4GB DDR3-1600 ECC Registered RAM
DDR3-1866 ECC Unbuffered DIMMs - CTO
4GB DDR3-1866 ECC Unbuffered RAM
2GB DDR3-1866 ECC Unbuffered RAM
DDR3-1866 ECC Registered DIMMs - CTO
16GB DDR3-1866 ECC Registered RAM
8GB DDR3-1866 ECC Registered RAM
4GB DDR3-1866 ECC Registered RAM
Sub-Section Description/Notes
For details on the supported memory configurations on the HP Z820 Workstation, please refer to the
System Technical Specifications - System Board section of this document.
DIMMs should be distributed across all four memory channels for optimal performance.
Each processor supports up to 4 channels of DDR3 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. If a 1066MHz capable CPU is used in the
system, the maximum speed the memory will run at is 1066MHz regardless of the specified speed of the
memory.
NOTE:
You cannot intermix registered and unbuffered DIMMs. The system will not work.
NOTE:
You cannot intermix LR DIMMs with either registered or unbuffered DIMMs. The system will not
work.
AMO
DDR3-1600 ECC Unbuffered DIMMs - AMO
HP 2GB (1x2GB) DDR3-1600 ECC RAM
HP 4GB (1x4GB) DDR3-1600 ECC RAM
DDR3-1600 ECC Registered DIMMs - AMO
32GB DDR3-1333 ECC Load Reduced (LR) RAM
A2Z53AA
16GB DDR3-1600 ECC Registered RAM
A2Z52AA
8GB DDR3-1600 ECC Registered RAM
A2Z51AA
4GB DDR3-1600 ECC Registered RAM
A2Z49AA
DDR3-1866 ECC Unbuffered DIMMs - AMO
HP 4GB (1x4GB) DDR3-1866 ECC RAM
E2Q91AA
HP 2GB (1x2GB) DDR3-1866 ECC RAM
E2Q90AA
DDR3-1866 ECC Registered DIMMs - AMO
HP 4GB (1x4GB) DDR3-1866 ECC Reg RAM
E2Q92AA
HP 8GB (1x8GB) DDR3-1866 ECC Reg RAM
E2Q94AA
HP 16GB (1x16GB) DDR3-1866 ECC Reg RAM
E2Q95AA
NOTE:
You cannot intermix registered and unbuffered DIMMs. The system will not work.
NOTE:
You cannot intermix LR DIMMs with either registered or unbuffered DIMMs. The system will not
work.
QuickSpecs
HP Z820 Workstation
Supported Components
DA - 14264 North America — Version 36 — December 1, 2013
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