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Four bare green DDR5 RDIMM sticks in a row

NEMIX RAM

NEMIX RAM 64GB (4x16GB) DDR5 4800 ECC RDIMM HP Z4 G5 memory upgrade

SKU CH-23AP-4RFZ1

64 GB kit of four 16 GB DDR5 4800 ECC registered DIMMs for HP Z4 G5 workstations

  • Total capacity64 GB (4 × 16 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • 64 GB capacity across four 16 GB modules for expanded workstation memory
  • DDR5 4800 speed with PC5-38400 bandwidth for faster data throughput
  • ECC registered RDIMM design detects and corrects memory errors automatically
  • 1 V operating voltage reduces power draw per module
  • 288-pin 1Rx8 layout fits HP Z4 G5 workstation slots

Targeted upgrade kit

This 64 GB kit contains four 16 GB DDR5 4800 registered ECC RDIMMs built for the HP Z4 G5 workstation. The modules run at 1.1 V with CL40 latency and use 288-pin packaging. IT professionals who manage fleets of compatible HPE systems receive a validated, stress-tested solution.

Capacity and headroom

The 64 GB total (4 x 16 GB) provides ample headroom for virtualization, large datasets and multi-application workloads on supported platforms. Memory-intensive tasks such as rendering or database caching benefit from the registered buffer and ECC protection. Systems that require more than four DIMM slots or higher densities will need a different configuration.

Thermals, noise and power draw

Operating at 1.1 V, the modules draw minimal power and run without heat spreaders in the workstation's managed airflow. No active cooling is present on the DIMMs themselves, so acoustics depend entirely on the system fans. Registered buffering adds negligible overhead to the platform's overall thermal envelope.

How it compares

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

Price $1,860.99
Pricier than about 67% of the 21,161 comparable items (median $397.99).
Total capacity 64 GB (4 × 16 GB)
Higher than about 60% of the 20,941 comparable items (median 32 GB).
Price per GB $29.08 per GB
Pricier than about 82% 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 numberMR38400-618K4
Total capacity64 GB (4 × 16 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 rank1Rx8
Power
Rated voltage1.1 V
Compatibility
Compatible systemsHPE
In the box
Included items64 GB (4 × 16 GB) DDR5 4800 MHz PC5-38400 1Rx8 1.1 V CL40 288-PIN ECC RDIMM Registered Server Memory KIT

Questions about this item

Will these 4800 MT/s DDR5 ECC RDIMMs run with the 1Rx8 modules already in my Z4 G5?

Yes — the kit is 4×16 GB DDR5 4800 CL40 1Rx8 registered ECC, matching the workstation's supported memory type and rank structure.

How can I verify the 64 GB kit is running at 4800 MT/s with ECC active after install?

Open BIOS or your OS memory utility; it should show 64 GB total, 4800 MT/s speed, CL40 timings, 1.10 V, and ECC enabled for each 288-pin DIMM.

Does the MR38400-618K4 package include only the four 16 GB RDIMMs or any extra parts?

The box contains the four 16 GB DDR5 4800 ECC RDIMMs and nothing else; no heat spreaders, cables or tools are included.

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