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Two green DDR4 RDIMM modules with gold contacts and black chips

OWC

OWC 32GB (2x16GB) DDR4 2666 ECC Registered RDIMM for Synology RACKSTATION RS18017xs+ server RAM

SKU CH-BPBQ-CZ3JM

32 GB dual-channel kit of 2666 MHz DDR4 ECC registered RDIMMs for Synology RackStation RS18017xs+ servers

  • Total capacity32 GB (2 × 16 GB)
  • Rated speedDDR4 2666 (PC4 21300)
  • CAS latencyCL19
  • Rated voltage1.2 V
  • Buffer typeRegistered
  • Memory rank2Rx4

Capacity 32GB (2 x 16GB)

Rank 2Rx4

  • ECC registered design protects data integrity in servers
  • 32 GB dual-channel kit expands Synology RS18017xs+ capacity
  • DDR4 2666 MHz CL19 matches OEM speed and latency
  • 2 V JEDEC standard voltage keeps power draw low
  • Backward compatible with 2133 MHz and 2400 MHz systems

Server memory upgrade kit

This OWC kit supplies 32GB of DDR4 server memory as two 16GB registered DIMMs rated at 2666MHz with CL19 latency. It is built for the Synology RACKSTATION RS18017xs+ and carries ECC error correction for data integrity in continuous operation. The modules run at 1.2V and conform to JEDEC PC4-21300 specifications.

Compatibility checklist

Verify that your system requires 288-pin DDR4 ECC registered RDIMMs and does not use unbuffered or load-reduced memory, as those types cannot be mixed with this kit. The motherboard must support registered modules and a dual-channel population of two 16GB sticks. Backward compatibility extends to 2133MHz and 2400MHz slots, but the platform must accept registered ECC memory.

Sustained workload behaviour

Under continuous load the registered buffer reduces electrical loading on the memory controller, helping maintain stability during long compute or storage tasks. ECC correction handles single-bit errors without interrupting the workload. The 1.2V operating voltage keeps power draw consistent across extended sessions in the RS18017xs+ environment.

How it compares

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

Price $204.99
Typical for this category: the median of 6,523 items is $188.99.
Total capacity 32 GB (2 × 16 GB)
Typical for this category: the median of 6,064 items is 32 GB.
Price per GB $6.41 per GB
Cheaper than about 60% of the 6,064 comparable items (median $7.25 per GB).

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Specifications

Product
Brand nameOWC
Part number2R6D42R4032P
Total capacity32 GB (2 × 16 GB)
Product type288-Pin DDR4 SDRAM
Performance
Rated speedDDR4 2666 (PC4 21300)
Memory
CAS latencyCL19
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

Does the kit include both modules or must the second 16 GB stick be bought separately?

The kit contains two 16 GB modules for a total of 32 GB, so nothing else is required to populate a dual-channel pair.

Should I pick the 2666 MHz CL19 version or a lower-speed alternative for the RS18017xs+?

The modules run at 2666 MHz CL19 and are backward compatible with 2133 MHz and 2400 MHz, so the 2666 MHz kit is the correct choice for full speed.

What does the PC4-21300 rating mean once the DIMMs are installed in the RS18017xs+?

PC4-21300 is the JEDEC designation for DDR4 2666 CL19 registered ECC memory, confirming the modules meet the server's required specification.

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