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Two green 288-pin DDR4 RDIMM modules, no heat spreader, 32GB kit

OWC

OWC 32GB (2x16GB) DDR4 2133MHz CL15 ECC Registered RDIMM 1.2V 288-pin Server RAM

SKU CH-QQ9M-4KD5J

ECC registered DDR4 dual-channel kit delivers 32 GB at 2133 MHz CL15 for server and workstation upgrades

  • Total capacity32 GB (2 × 16 GB)
  • Rated speedDDR4 2133 (PC4 17000)
  • CAS latencyCL15
  • Rated voltage1.2 V
  • Buffer typeRegistered
  • Memory rank2Rx4

Capacity 32GB (2 x 16GB)

Rank 2Rx4

  • ECC registered design protects data integrity in servers
  • Dual-channel 32GB kit (2×16GB) maximises memory bandwidth
  • DDR4 2133MHz CL15 delivers responsive multitasking performance
  • Low 1.2V operation reduces server power consumption
  • 288-pin RDIMM form factor fits workstation and NAS systems

Server-grade ECC registered memory

This OWC kit supplies 32GB of DDR4 ECC registered RDIMM in a matched pair of 16GB modules. It is built for servers, workstations and NAS systems that require registered memory with error correction. The modules operate at 1.2V and conform to JEDEC PC4-17000 specifications. Standard desktop computers cannot use this memory.

Replaces non-ECC or unbuffered DIMMs

The upgrade is worthwhile when a system demands registered ECC modules and cannot accept unbuffered memory. Mixing registered and unbuffered DIMMs is not supported, so a full replacement is required. The dual-channel kit simplifies installation by providing two identical 16GB sticks. Older infrastructure gains extended service life with this compliant upgrade.

Sustained load stability with ECC

Error correction detects and corrects single-bit errors during continuous operation, reducing the risk of data corruption in long-running workloads. Registered buffering lowers electrical load on the memory controller, helping maintain signal integrity across all 288 pins. The CL15 latency at 2133MHz delivers consistent timing under prolonged use. No heat spreader is fitted, so airflow in the chassis manages module temperature.

How it compares

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

Price $212.99
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 $6.66 per GB
Cheaper than about 57% 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 number2R1D42R4032P
Total capacity32 GB (2 × 16 GB)
Product type288-Pin DDR4 ECC RDIMM
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

Will these 288-pin RDIMMs fit a standard desktop motherboard?

No. The modules are registered ECC DDR4 RDIMMs built for server and workstation platforms; they will not work in consumer desktop boards that require unbuffered memory.

What is the correct way to install the 2Rx4 dual-channel kit?

Insert both 16 GB modules into the same channel pair — usually slots of matching colour — so the memory controller can run them in dual-channel mode; installing them in mismatched slots is the common error.

Do the modules need active cooling or thermal-pad replacement over time?

The sticks ship without a heat spreader and run at 1.2 V; in a chassis with normal server airflow no extra cooling or pad maintenance is required.

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