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Green rectangular circuit board with black memory chips and gold edge connectors

NEMIX RAM

NEMIX RAM 64GB DDR4 2666 CL19 4Rx4 ECC RDIMM memory upgrade

SKU CH-A01H-EMNMB

64GB DDR4 2666MHz CL19 ECC registered RDIMM module for Supermicro servers

  • Total capacity64 GB
  • Rated speedDDR4 2666 (PC4 21300)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL19
  • Buffer typeRegistered
  • Rated voltage1.2 V
  • 64 GB capacity expands server memory headroom
  • DDR4 2666 speed delivers 21300 MT/s bandwidth
  • ECC registered design corrects errors for stability
  • 2 V operation reduces power draw per module
  • 288-pin RDIMM form factor fits Supermicro platforms

64GB DDR4 2666 ECC RDIMM for Supermicro servers

This 64GB registered DDR4 module runs at 2666MHz with CL19 latency and 1.20V operation. It uses a 4Rx4 organisation and 288-pin form factor for Supermicro server and workstation platforms. ECC and registered buffering provide the data integrity required in mission-critical environments.

Sustained load behaviour with registered ECC

Registered buffering reduces electrical load on the memory controller during continuous operation. ECC corrects single-bit errors on the fly, preventing data corruption during long compute runs. The 4Rx4 density delivers high capacity per slot while maintaining stability under constant throughput demands.

Verify Supermicro model and slot population rules

Confirm the target system appears in the Supermicro MEM-DR464L-SL01-ER26 compatibility list before ordering. Check the motherboard manual for maximum supported capacity per channel and approved rank configurations. Ensure the BIOS revision supports 4Rx4 registered modules at the rated speed.

How it compares

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

Price $287.99
Cheaper than about 55% of the 21,161 comparable items (median $397.99).
Total capacity 64 GB
Higher than about 60% of the 20,941 comparable items (median 32 GB).
Price per GB $4.50 per GB
Cheaper than about 81% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameNEMIX RAM
Product lineSuperMicro Server/Workstation Compatible Series Memory
Model nameSuperMicro DDR4 2666 MHz ECC RDIMM Registered Server Memory
Part numberMR21300-944K1
Total capacity64 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 rank4Rx4
Power
Rated voltage1.2 V
Compatibility
Compatible systemsSupermicro
In the box
Included items64 GB (1 × 64 GB) DDR4 2666 MHz PC4-21300 4Rx4 1.2 V CL19 288-PIN ECC RDIMM Registered Server Memory

Questions about this item

How much power does the 1.2 V DDR4 2666 module draw when the server runs continuously?

The module operates at 1.20 V, the standard voltage for DDR4 RDIMMs, so power draw stays within the normal range for registered server memory under sustained load.

What motherboard feature must the system provide for this 288-pin ECC RDIMM to function?

The board must support DDR4 registered ECC memory with 4Rx4 organisation and a 288-pin RDIMM slot; Supermicro platforms listed in the compatibility data meet that requirement.

Will the CL19 2666 MT/s timing slow down existing DDR4 2666 RDIMMs already installed in the same Supermicro server?

All modules run at the lowest common speed and latency, so adding this CL19 stick will not force faster modules to run slower than 2666 MT/s CL19.

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