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Green 288-pin DDR4 ECC registered DIMM circuit board with black memory chips, no heat spreader

OWC

OWC 32GB DDR4 2666 ECC Registered DIMM 2Rx4 1.2V

SKU CH-3RM9-RRRZC

32 GB DDR4-2666 ECC registered DIMM with CL19 latency and 1.2 V operation for servers and NAS

  • Total capacity32 GB
  • Rated speedDDR4 2666 (PC4 21300)
  • CAS latencyCL19
  • Rated voltage1.2 V
  • Buffer typeRegistered
  • Memory rank2Rx4
  • ECC protection prevents data corruption in critical workloads
  • Registered design stabilises signal integrity for server platforms
  • 32 GB capacity expands memory headroom for virtualisation
  • 2666 MHz speed with CL19 latency delivers responsive throughput
  • JEDEC and RoHS compliance ensures warranty-safe upgrades

32GB DDR4 2666 ECC Registered DIMM for servers

This 32GB DDR4 2666 ECC registered DIMM is built for servers, workstations and compatible NAS systems. It uses a 288-pin form factor with 2Rx4 organisation and runs at 1.2V. The module is designed for systems that require registered memory with error correction.

CL19 latency and backward compatibility to 2133

The module operates at CL19 latency and conforms to the PC4-21300 standard. It is backward compatible with 2133 MHz and 2400 MHz DDR4 platforms, so it can run at lower speeds when the host system requires it. JEDEC and ROHS compliance ensures the module meets industry specifications for registered ECC memory.

Replaces unbuffered or load-reduced memory

This registered ECC DIMM cannot be mixed with unbuffered or ECC load-reduced modules. It is suited for upgrading slots that specifically require registered memory. Buyers who need unbuffered ECC or load-reduced DIMMs should select the module type their platform specifies.

How it compares

Measured against everything we stock in ECC Server RAM, at today’s prices. Recalculated every night.

Price $224.99
Typical for this category: the median of 6,523 items is $188.99.
Total capacity 32 GB
Typical for this category: the median of 6,064 items is 32 GB.
Price per GB $7.03 per GB
Typical for this category: the median of 6,064 items is $7.25 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 nameOWC
Part number2R6D42R432 GB
Total capacity32 GB
Product type288-Pin DDR4 ECC RDIMM
Performance
Rated speedDDR4 2666 (PC4 21300)
Memory
CAS latencyCL19
ECC supportYes
Buffer typeRegistered
Memory rank2Rx4
Heat spreaderNo
Power
Rated voltage1.2 V

Questions about this item

Should I choose this 32GB module or a different capacity for my Synology D4ER02-32G replacement?

This 32GB DDR4 2666 ECC Registered DIMM matches the Synology D4ER02-32G part number exactly, so it is the direct replacement capacity for that system.

What does the 2666MHz speed mean once the module is installed in my server?

The module runs at 2666MHz CL19 at 1.2V, and will also operate at 2133MHz or 2400MHz if the platform requires a lower speed.

Is the 288-pin DDR4 interface compatible with standard desktop motherboards?

No, this is a 288-pin ECC Registered DIMM for servers, workstations and NAS systems; it will not work in standard desktop computers.

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