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Green rectangular DDR4 RDIMM with black memory chips on both sides and gold edge contacts

OWC

OWC 2R1D42R416GB 16GB DDR4 2133 ECC Registered RDIMM 288-Pin 2Rx4 1.2V Server RAM

SKU CH-4WTN-0ZC5H

16 GB DDR4 ECC registered RDIMM at 2133 MHz CL15 matching Kingston KVR21R15D4/16 and KTL-TS421/16G for servers and workstations

  • Total capacity16 GB
  • Rated speedDDR4 2133 (PC4 17000)
  • CAS latencyCL15
  • Rated voltage1.2 V
  • Buffer typeRegistered
  • Memory rank2Rx4
  • ECC protection prevents data corruption in servers
  • Registered design stabilises heavy multi-module workloads
  • 16 GB capacity expands memory for virtualisation
  • DDR4 2133 speed matches Kingston KVR21R15D4/16 specs
  • 2 V operation reduces power draw and heat

Server Memory for Workstations and NAS

This 16GB DDR4 ECC Registered RDIMM is built for servers, workstations and NAS systems that require error-correcting registered memory. It will not work in standard desktop computers and cannot be mixed with unbuffered modules.

16GB Capacity with 2133MHz Speed

The single module delivers 16GB at DDR4 2133 (PC4-17000) with CL15 latency and a 2Rx4 rank configuration. It provides registered ECC headroom for multi-tasking workloads, while the 2133MHz ceiling limits throughput on platforms that support faster DDR4 speeds.

Low-Voltage Operation Without Heat Spreader

Running at 1.2V, the module draws minimal power and relies on system airflow for cooling since no heat spreader is fitted. In typical server chassis the bare PCB runs quietly, though dense configurations with restricted airflow may see higher temperatures.

How it compares

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

Price $93.99
Cheaper than about 71% of the 6,523 comparable items (median $188.99).
Total capacity 16 GB
Lower than about 60% of the 6,064 comparable items (median 32 GB).
Price per GB $5.87 per GB
Cheaper than about 65% of the 6,064 comparable items (median $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 number2R1D42R416 GB
Total capacity16 GB
Product type288-Pin DDR4 ECC RDIMM
Performance
Rated speedDDR4 2133 (PC4 17000)
Memory
CAS latencyCL15
ECC supportYes
Buffer typeRegistered
Memory rank2Rx4
Heat spreaderNo
Power
Rated voltage1.2 V

Questions about this item

Can this 288-pin DDR4 2133 ECC RDIMM share a server board with other DDR4 2133 registered modules I already own?

Yes — it is a JEDEC-standard PC4-17000 CL15 1.2 V registered DIMM, so it will run alongside identical-speed DDR4 ECC RDIMMs on the same platform.

How do I confirm the module is running at 2133 MHz with ECC active after installation?

Check the BIOS memory info or OS tools such as dmidecode; they should report 2133 MT/s, CL15, 1.2 V and ECC registered operation.

Does the 16 GB 2Rx4 stick ship alone or with any brackets, cables or documentation I might need?

Only the memory module itself is included; no heat spreader, brackets, cables or printed guides come in the package.

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