We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Green circuit board with gold edge connectors and black memory chips

NEMIX RAM

NEMIX RAM 32GB DDR4 2666 ECC LRDIMM CL19 HPE Z640 memory upgrade

SKU CH-JVFC-5RCRB

A 32 GB DDR4 2666 ECC LRDIMM module with CL19 latency and 1.2 V operation for HPE Z640 servers

  • Total capacity2 TB (16 × 128 GB)
  • Rated speedDDR4 2666 (PC4 21300)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL19
  • Buffer typeLoad Reduced
  • Rated voltage1.2 V
  • 32 GB capacity supports large server workloads
  • DDR4 2666 speed handles intensive data tasks
  • ECC LRDIMM design protects data integrity under load
  • 2 V operation reduces power draw in dense configs
  • 288-pin 2Rx4 module fits HPE Z640 slots

HPE Z640 server upgrade

This 32 GB DDR4 2666 module is built for the HPE Z640 workstation and server platform. It delivers ECC protection and load-reduced signalling in a single 288-pin LRDIMM. The 1.2 V operating voltage matches the platform specification.

2Rx4 load-reduced design

The 2Rx4 organisation reduces electrical load on the memory controller, allowing larger total capacities than standard RDIMMs. No heat spreader is fitted, so the module relies on chassis airflow. It installs directly into any compatible DDR4 slot on the Z640 motherboard.

32 GB per module headroom

Each stick provides 32 GB at CL19 latency, scaling toward the 2 TB maximum supported by a 16-slot configuration. The DDR4 2666 speed ceiling is fixed by the platform; workloads needing higher bandwidth or lower latency would require a newer generation.

How it compares

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

Price $245.99
Cheaper than about 56% of the 21,161 comparable items (median $397.99).
Total capacity 2 TB (16 × 128 GB)
Higher than about 99% of the 20,941 comparable items (median 32 GB).
Price per GB $0.12 per GB
Cheaper than about 99% of the 20,941 comparable items (median $8.19 per GB).

New to this? Buying memory and SSDs with crypto — what to check, what it costs to pay, and what is never asked for.

Specifications

Product
Brand nameNEMIX RAM
Product lineHPE Server/Workstation Compatible Series Memory
Model nameHPE DDR4 2666 MHz ECC LRDIMM Load Reduced Server Memory
Part numberML21300-324K1
Total capacity2 TB (16 × 128 GB)
Product type288-Pin DDR4 LRDIMM
Performance
Rated speedDDR4 2666 (PC4 21300)
Processor
ChipsetMajor OEM Samsung, Micron, Hynix
Memory
CAS latencyCL19
ECC supportYes
Buffer typeLoad Reduced
Heat spreaderNo
Memory rank2Rx4
Power
Rated voltage1.2 V
Compatibility
Compatible systemsHPE
In the box
Included items32 GB (1 × 32 GB) DDR4 2666 MHz PC4-21300 2Rx4 1.2 V CL19 288-PIN ECC LRDIMM Load Reduced Server Memory

Questions about this item

Does the 2Rx4 rank configuration limit how many modules the HPE Z640 can accept?

The module uses a 2Rx4 organisation, which the Z640 memory controller treats as two logical ranks per DIMM; total rank count across all populated slots must stay within the platform limit.

What thermal load does the 1.2 V LRDIMM add when the server runs continuously?

At 1.2 V the DDR4 LRDIMM draws less power per bit than standard registered DIMMs, and the onboard register buffers reduce signal loading, so sustained heat output stays modest.

Which motherboard feature must the Z640 already provide for this ECC LRDIMM to function?

The workstation must support DDR4 2666 LRDIMM with ECC and 288-pin slots; without that chipset and BIOS support the module will not initialise.

More in Model-Specific Memory Upgrades

Similar items