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Two green DDR4 RDIMM modules with gold contacts, no heat spreaders

OWC

OWC 64GB (2x32GB) DDR4 2133 ECC Registered RDIMM server RAM

SKU CH-ZKQ8-JKBP1

64 GB dual-channel kit of DDR4-2133 ECC registered RDIMMs with CL15 latency and 1.2 V operation

  • Total capacity64 GB (2 × 32 GB)
  • Rated speedDDR4 2133 (PC4 17000)
  • CAS latencyCL15
  • Rated voltage1.2 V
  • Buffer typeRegistered
  • Memory rank2Rx4

Capacity 64GB (2 x 32GB)

  • ECC registered design protects data integrity in servers and workstations
  • 64 GB dual-channel kit (2 × 32 GB) expands memory capacity for demanding workloads
  • DDR4 2133 MHz CL15 at 1.2 V delivers JEDEC-standard performance
  • 288-pin RDIMM form factor fits compatible NAS and server platforms
  • RoHS compliant and validated to meet OEM specifications

Server ECC Registered DDR4 Kit

This 64GB kit contains two 32GB DDR4 2133MHz registered DIMMs built for servers, workstations and compatible NAS units such as the FS3017, FS2017 and RS18017xs+. It delivers ECC error correction and registered buffering for data integrity in multi-module configurations.

DDR4 2133 Registered Limitations

The modules operate at 2133MHz with CL15 latency and 1.2V, conforming to the PC4-17000 JEDEC standard. Registered ECC memory cannot be mixed with unbuffered or load-reduced DIMMs and will not function in standard desktop platforms that lack registered memory support.

Build and Connector Implications

Each stick uses a 288-pin DDR4 form factor without a heat spreader, keeping the profile low for dense server chassis. The dual-rank 2Rx4 organisation fits two modules per channel, and the JEDEC-compliant build ensures warranty-safe upgrades in qualified OEM systems.

How it compares

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

Price $386.99
Pricier than about 65% of the 6,523 comparable items (median $188.99).
Total capacity 64 GB (2 × 32 GB)
Higher than about 70% of the 6,064 comparable items (median 32 GB).
Price per GB $6.05 per GB
Cheaper than about 63% of the 6,064 comparable items (median $7.25 per GB).

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Specifications

Product
Brand nameOWC
Part number2R1D42R4064P
Total capacity64 GB (2 × 32 GB)
Product type288-Pin DDR4 SDRAM
Performance
Rated speedDDR4 2133 (PC4 17000)
Memory
CAS latencyCL15
ECC supportYes
Buffer typeRegistered
Memory rank2Rx4
Kit configurationDual Channel Kit
Heat spreaderNo
Power
Rated voltage1.2 V

Other versions of this model

5 more in the same range

Questions about this item

Should I choose the 64 GB dual-channel kit or a single 32 GB module?

The 64 GB kit provides two 32 GB modules that run in dual-channel mode, doubling memory bandwidth compared with a single stick.

What does the 2133 MHz speed mean for my NAS or server?

The modules operate at 2133 MHz with CL15 latency, delivering up to 17 GB/s of theoretical bandwidth per channel.

Will the 288-pin DDR4 registered ECC interface work in my Synology FS3017?

Yes, the 288-pin DDR4 registered ECC design matches the FS3017, FS2017 and RS18017xs+ memory slots exactly.

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