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Four green 288-pin DDR4 RDIMM modules with black chips, no heat spreader

OWC

OWC 32GB (4x8GB) DDR4 2133MHz CL15 ECC Registered RDIMM 1.2V 288-pin Server RAM

SKU CH-PWFB-CJP8A

32 GB quad-channel ECC registered DDR4-2133 kit with CL15 latency and 1.2 V operation for servers and workstations

  • Capacity32GB (4 x 8GB)
  • Type288-Pin DDR4 ECC RDIMM
  • SpeedDDR4 2133 (PC4 17000)
  • CAS LatencyCL15
  • Voltage1.2V
  • ECCYes

Capacity 32GB (4 x 8GB)

Rank 1Rx4

  • ECC registered design protects data integrity in servers
  • 32 GB total capacity across four 8 GB modules
  • DDR4 2133 MHz CL15 speed for responsive workloads
  • Low 1.2 V voltage reduces power draw and heat
  • 288-pin RDIMM form factor fits server and workstation slots

Server-grade ECC RDIMM kit

This 32GB kit contains four 8GB DDR4 2133MHz modules built to the PC4-17000 standard with CL15 latency. Each stick is a 288-pin registered DIMM with on-die ECC and a 1Rx4 organisation, designed for servers, workstations and compatible NAS systems. The modules operate at 1.2V and carry no heat spreaders, relying on chassis airflow instead. They will not work in standard desktop platforms or alongside unbuffered memory.

JEDEC-compliant registered design

Registered signalling and ECC correction keep data integrity high in multi-socket environments while the 1.2V supply limits power draw per module. With no onboard heat spreaders, thermals depend entirely on case ventilation; typical server airflow keeps temperatures well within JEDEC limits. The CL15 timing at 2133MHz delivers predictable latency without elevated voltage, so acoustic impact is limited to the system fans already present in the chassis.

Sustained load stability

Under continuous workloads the registered buffer reduces electrical loading on the memory controller, allowing all four modules to populate dual-channel slots without signal degradation. ECC detects and corrects single-bit errors in real time, preventing silent data corruption during long compute runs. The 1Rx4 density maintains consistent bandwidth across extended sessions, and the 1.2V operation avoids thermal throttling that higher-voltage kits might exhibit in dense configurations.

Highlights

  • ECC registered design protects data integrity in servers
  • 32 GB total capacity across four 8 GB modules
  • DDR4 2133 MHz CL15 speed for responsive workloads
  • Low 1.2 V voltage reduces power draw and heat
  • 288-pin RDIMM form factor fits server and workstation slots

Specifications

BrandOWC
Part Number2R1D41R4032S
Capacity32GB (4 x 8GB)
Type288-Pin DDR4 ECC RDIMM
SpeedDDR4 2133 (PC4 17000)
CAS LatencyCL15
Voltage1.2V
ECCYes
Buffered/RegisteredRegistered
Rank1Rx4
Multi-channel KitDual Channel Kit
Heat SpreaderNo

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Questions about this item

How do I install the 288-pin DDR4 RDIMM modules and what step is commonly missed?

Align the notch on each module with the slot key, press firmly until the retention clips click, and populate all four slots in matched pairs so the registered buffer initialises correctly.

What maintenance or replacement will the 1Rx4 ECC registered kit need over time?

No routine maintenance is required; the modules have no heat spreader and run at 1.2V, so only a failed stick would need replacing under the lifetime warranty.

What limit appears first when the 2133MHz CL15 kit runs under sustained server load?

The registered buffer adds one cycle of latency, so the CL15 timing ceiling is reached before thermal or voltage headroom becomes a factor.

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