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Four green DDR5 RDIMM modules, bare circuit boards with black chips

NEMIX RAM

NEMIX RAM 128GB (4x32GB) DDR5 4800 CL40 1.1V ECC RDIMM HP Z4 G5 memory upgrade

SKU CH-DP0C-JBS2B

A 128 GB DDR5 kit of four 32 GB ECC registered modules running at 4800 MT/s with CL40 latency and 1.1 V operation for the HP Z4 G5 workstation

  • Total capacity128 GB (4 × 32 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • 128 GB total capacity across four 32 GB modules
  • DDR5 4800 speed rated at PC5-38400 bandwidth
  • ECC registered RDIMM design protects data integrity
  • 10 V operating voltage reduces power draw
  • 288-pin DDR5 form factor fits HP Z4 G5 workstations

NEMIX RAM 128GB DDR5 4800 ECC RDIMM kit

This 128GB kit contains four 32GB DDR5 4800 registered ECC modules built for the HP Z4 G5 workstation. It targets IT professionals and workstation users who need maximum memory capacity with error correction for mission-critical workloads. The 1Rx4 organisation and 1.1V operation match the platform's registered memory architecture.

Tool-free DIMM installation on the Z4 G5

Installation follows the standard workstation procedure: power down, open the chassis, align the 288-pin key and press each module until the ejectors latch. The registered design adds electrical load, so the system must support registered DIMMs or the modules will not initialise. Mixing registered with unbuffered memory prevents boot.

Verify registered ECC support and slot count

Confirm the workstation accepts DDR5 registered ECC RDIMMs and provides at least four DDR5 slots before ordering. The 1Rx4 rank structure and CL40 timing are fixed by the module design. Systems limited to unbuffered memory or fewer than four slots cannot use this kit as intended.

How it compares

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

Price $3,740.99
Pricier than about 76% of the 21,161 comparable items (median $397.99).
Total capacity 128 GB (4 × 32 GB)
Higher than about 70% of the 20,941 comparable items (median 32 GB).
Price per GB $29.23 per GB
Pricier than about 83% 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 numberMR38400-314K4
Total capacity128 GB (4 × 32 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 rank1Rx4
Power
Rated voltage1.1 V
Compatibility
Compatible systemsHPE
In the box
Included items128 GB (4 × 32 GB) DDR5 4800 MHz PC5-38400 1Rx4 1.1 V CL40 288-PIN ECC RDIMM Registered Server Memory KIT

Questions about this item

How do I verify the 128GB kit is running at DDR5 4800 CL40 after installing it in the HP Z4 G5?

Open the system BIOS or UEFI and confirm the memory speed reads 4800 MT/s with CAS latency 40; the OS task manager or a tool like CPU-Z will also show 128 GB total across four 32 GB modules at 1.1 V.

What exactly ships in the box and do I need any extra parts for the HP Z4 G5?

The package contains four 32 GB 288-pin DDR5 RDIMM modules (1Rx4, ECC, registered, 1.10 V); no additional hardware or cables are required for installation in the compatible workstation.

Why choose this 128 GB (4×32 GB) DDR5 4800 CL40 ECC RDIMM kit over other capacities?

This kit matches the HP Z4 G5 qualified configuration: four ranked 1Rx4 registered DIMMs delivering 128 GB total at the platform's native 4800 MT/s speed with CL40 timing and 1.1 V operation.

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