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Four green DDR5 RDIMM modules with black chips, no heat spreaders

NEMIX RAM

NEMIX RAM 256GB (4x64GB) DDR5 4800 CL40 ECC RDIMM HP Z4 G5 Workstation memory upgrade

SKU CH-VCH1-4PEAZ

256 GB DDR5 ECC registered server memory kit with four 64 GB modules at 4800 MT/s CL40, 1.10 V, 288-pin RDIMM for HP Z4 G5 Workstation

  • Total capacity256 GB (4 × 64 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • 256 GB total capacity across four 64 GB modules
  • DDR5 4800 speed rated at PC5-38400 bandwidth
  • ECC registered RDIMM with CL40 latency for data integrity
  • 1 V operating voltage reduces power draw
  • 288-pin 2Rx4 design validated for HP Z4 G5 Workstation

256GB DDR5 ECC RDIMM kit for HP Z4 G5

This 256GB kit contains four 64GB DDR5 4800 CL40 registered DIMMs with ECC. It is built for the HP Z4 G5 workstation and suits professionals who need large, error-corrected memory capacity for stable compute workloads.

Tool-less DIMM installation with population rules

The modules slot into the 288-pin DDR5 sockets without tools. Installation is straightforward, but the workstation requires registered ECC RDIMMs populated in supported configurations; mixing unbuffered or non-ECC DIMMs will prevent boot.

256GB registered ECC capacity for heavy workloads

Four dual-rank 64GB modules deliver 256GB at 1.1V, providing headroom for virtualization, large datasets and multi-application sessions. The registered design supports this density, though the platform's maximum supported memory per channel ultimately limits further expansion.

How it compares

Measured against everything we stock in Model-Specific Memory Upgrades, at today’s prices. Recalculated every night.

Price $6,959.99
Pricier than about 83% of the 21,161 comparable items (median $397.99).
Total capacity 256 GB (4 × 64 GB)
Higher than about 80% of the 20,941 comparable items (median 32 GB).
Price per GB $27.19 per GB
Pricier than about 76% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameNEMIX RAM
Product lineHPE Server/Workstation Compatible Series Memory
Model nameHPE DDR5 4800 MHz ECC RDIMM Registered Server Memory
Part numberMR38400-924K4
Total capacity256 GB (4 × 64 GB)
Product type288-Pin DDR5 RDIMM
Performance
Rated speedDDR5 4800 (PC5 38400)
Processor
ChipsetMajor OEM Samsung, Micron, Hynix
Memory
CAS latencyCL40
ECC supportYes
Buffer typeRegistered
Heat spreaderNo
Memory rank2Rx4
Power
Rated voltage1.1 V
Compatibility
Compatible systemsHPE
In the box
Included items256 GB (4 × 64 GB) DDR5 4800 MHz PC5-38400 2Rx4 1.1 V CL40 288-PIN ECC RDIMM Registered Server Memory KIT

Questions about this item

Will the HP Z4 G5 POST and show 256 GB at DDR5 4800 CL40?

After installing all four modules, enter the BIOS or UEFI; it should report 256 GB total, DDR5 4800 speed, and CL40 latency with ECC active.

What ships in the kit and what must I source separately?

The box contains four 64 GB DDR5 4800 CL40 2Rx4 ECC RDIMM modules (1.10 V, 288-pin). No cables, tools, or heat spreaders are included.

Should I choose this 256 GB kit or a smaller capacity for the Z4 G5?

Select the 256 GB (4 × 64 GB) kit when the workload needs maximum registered ECC capacity; choose a lower-capacity kit if 256 GB exceeds the application requirement.

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