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 rectangular DDR4 RDIMM module with black chips and gold contacts, no heat spreader

NEMIX RAM

NEMIX RAM 8GB DDR4 2666MHz ECC RDIMM 1Rx4 CL19 1.2V 288-Pin HPE 864706-591 memory upgrade

SKU CH-79M2-28X5A

An 8 GB DDR4-2666 ECC registered DIMM validated for HPE servers using 864706-591

  • Total capacity8 GB
  • Rated speedDDR4 2666 (PC4 21300)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL19
  • Buffer typeRegistered
  • Rated voltage1.2 V
  • ECC protection guards data integrity in critical workloads
  • Registered design stabilises signal for dense server configurations
  • DDR4 2666 speed matches HPE 864706-591 specification
  • 2 V operation reduces power draw per module
  • 1Rx4 single-rank layout keeps memory channels balanced

HPE 864706-591 Compatible DDR4 ECC RDIMM

This NEMIX RAM module is an 8 GB DDR4 2666 MHz registered DIMM built for HPE servers and workstations. It operates at 1.2 V with CL19 latency and uses a single-rank 1Rx4 organisation. The 288-pin form factor fits standard DDR4 RDIMM slots in compatible HPE systems.

Suited for ECC registered memory upgrades.

IT professionals maintaining HPE infrastructure can use this module to expand or replace memory in supported servers. Buyers needing unbuffered UDIMM memory for desktop motherboards or non-ECC configurations should look at a different product line because this module is registered and ECC only.

Registered ECC with 1Rx4 rank decides fit

The single-rank 1Rx4 registered ECC design determines whether the memory works in a given HPE platform. Verify the server qualification list for 864706-591 compatibility before purchase, as registered modules require chipset and BIOS support for ECC RDIMM operation.

How it compares

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

Price $52.99
Cheaper than about 77% of the 21,161 comparable items (median $397.99).
Total capacity 8 GB
Lower than about 80% of the 20,941 comparable items (median 32 GB).
Price per GB $6.62 per GB
Cheaper than about 60% 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 RDIMM Registered Server Memory
Part numberMR21300-818K1
Total capacity8 GB
Product type288-Pin DDR4 RDIMM
Performance
Rated speedDDR4 2666 (PC4 21300)
Processor
ChipsetMajor OEM Samsung, Micron, Hynix
Memory
CAS latencyCL19
ECC supportYes
Buffer typeRegistered
Heat spreaderNo
Memory rank1Rx4
Power
Rated voltage1.2 V
Compatibility
Compatible systemsHPE
In the box
Included items8 GB (1 × 8 GB) DDR4 2666 MHz PC4-21300 1Rx4 1.2 V CL19 288-PIN ECC RDIMM Registered Server Memory

Questions about this item

My server requires DDR4-2666 ECC RDIMM modules — does this 8 GB stick run at 1.2 V and CL19 as specified?

Yes, it operates at 1.2 V with CAS latency 19 and is rated DDR4-2666 (PC4-21300) for registered ECC server platforms.

I plan to add this module alongside existing HPE 864706-591 DIMMs — will the 1Rx4 rank organisation match?

The module is a single-rank 1Rx4 design, matching the rank structure of the HPE 864706-591 part for compatible population rules.

After installation, how can I confirm the module is registered and ECC-enabled in the BIOS?

The POST memory summary should show 8 GB DDR4-2666 Registered ECC with 1Rx4 organisation and 1.2 V operation.

More in Model-Specific Memory Upgrades

Similar items