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Green circuit board with black memory chips and gold edge contacts

OWC

OWC 16GB DDR4 2933MHz CL21 ECC Registered RDIMM 1.2V 288-pin server RAM

SKU CH-DJ0Z-AQ5R4

16 GB DDR4 2933 MHz ECC registered RDIMM for servers, workstations and NAS, CL21 1.2 V 288-pin with 2133/2400/2666 MHz backward compatibility

  • Total capacity16 GB
  • Rated speedDDR4 2933 (PC4 23400)
  • CAS latencyCL21
  • Rated voltage1.2 V
  • Buffer typeRegistered
  • Memory rank2Rx4

Capacity 16GB

Show 4 more

Rank 2Rx4

  • ECC registered design protects server data integrity
  • 2933MHz DDR4 speed accelerates demanding workloads
  • 2V operation reduces power draw in dense configurations
  • Backward compatible with 2133MHz 2400MHz 2666MHz systems
  • Single 16GB 2Rx4 module simplifies capacity scaling

Server-grade ECC RDIMM

This 16GB DDR4 module runs at 2933MHz with CL21 latency and 1.2V operation. It uses a 2Rx4 registered design with full ECC support for data integrity. The 288-pin form factor fits server and workstation memory slots that require registered DIMMs.

Registered DIMM integration

The module requires a platform that supports DDR4 registered ECC memory, such as compatible servers, workstations or NAS systems. It cannot be used in standard desktop boards or mixed with unbuffered DIMMs. Backward compatibility with 2133MHz, 2400MHz and 2666MHz buses allows deployment in older DDR4 platforms.

Low-voltage thermal profile

Operating at 1.2V keeps power draw modest for high-density server configurations. The absence of a heat spreader relies on chassis airflow for cooling, which is typical for registered DIMMs in managed environments. JEDEC compliance ensures stable operation within standard thermal limits.

How it compares

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

Price $114.99
Cheaper than about 64% 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 $7.19 per GB
Typical for this category: the median of 6,064 items is $7.25 per GB.

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Specifications

Product
Brand nameOWC
Part number2R9D42R416 GB
Total capacity16 GB
Product type288-Pin DDR4 ECC RDIMM
Performance
Rated speedDDR4 2933 (PC4 23400)
Memory
CAS latencyCL21
ECC supportYes
Buffer typeRegistered
Memory rank2Rx4
Heat spreaderNo
Power
Rated voltage1.2 V

Other versions of this model

5 more in the same range

Questions about this item

What sustained-use limit appears first with the 2Rx4 registered ECC module running at 2933 MHz?

The registered buffer adds one cycle of address latency, so the memory controller hits command-scheduling throughput limits before bandwidth or temperature become bottlenecks.

How much heat and power does the 1.2 V DDR4 RDIMM produce during all-day server loads?

At 1.2 V with no heat spreader the module runs cool; typical registered DDR4 at this voltage draws only a few watts per stick and stays well within standard server airflow limits.

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

A server or workstation motherboard with DDR4 RDIMM slots, a memory controller that supports ECC registered operation, and a CPU/chipset qualified for 2933 MT/s (or 2133/2400/2666 MT/s fallback).

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