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Green rectangular circuit board with gold edge connectors and black memory chips on both sides

OWC

OWC 128GB DDR4 2933 PC4-23400 CL21 8Rx4 288-pin 1.2V ECC Registered RDIMM server RAM

SKU CH-BKWB-CXY66

A 128GB DDR4 2933MHz ECC registered RDIMM for servers, workstations and NAS systems with CL21 latency and 1.2V operation

  • Capacity128GB
  • Type288-Pin DDR4 ECC RDIMM
  • SpeedDDR4 2933 (PC4 23400)
  • CAS Latency21
  • Voltage1.2V
  • ECCYes
  • ECC registered design prevents data corruption in critical workloads
  • 128GB single module maximises capacity per DIMM slot
  • DDR4 2933MHz CL21 delivers high throughput for server tasks
  • 2V operation reduces power draw and heat output
  • Backward compatible with 2133, 2400 and 2666MHz systems

Server ECC registered upgrade

This 128GB DDR4 module is built for workstations and servers that require registered ECC memory. It operates at 2933MHz with a CAS latency of 21 and runs at the standard 1.2V. The single 288-pin DIMM uses an 8Rx4 organisation and contains no heat spreader. It will not work in standard desktop computers and must not be mixed with unbuffered or load-reduced modules.

Thermals and power in normal use

Running at 1.2V keeps power draw low for a high-capacity registered DIMM. The bare PCB design relies on chassis airflow rather than a dedicated spreader, so adequate case ventilation is needed to maintain stable temperatures under sustained load. Registered buffering adds minimal latency while reducing electrical load on the memory controller, helping overall system efficiency.

Replaces slower DDR4 or expands capacity

The module is backward compatible with 2133MHz, 2400MHz and 2666MHz systems, allowing it to replace slower DDR4 DIMMs while running at the highest supported speed. It suits administrators extending the life of existing infrastructure or building new servers that need maximum density per slot. Buyers needing unbuffered memory or desktop compatibility should look elsewhere.

Puntos fuertes

  • ECC registered design prevents data corruption in critical workloads
  • 128GB single module maximises capacity per DIMM slot
  • DDR4 2933MHz CL21 delivers high throughput for server tasks
  • 2V operation reduces power draw and heat output
  • Backward compatible with 2133, 2400 and 2666MHz systems

Especificaciones

BrandOWC
Part Number2R9D48R4128G
Capacity128GB
Type288-Pin DDR4 ECC RDIMM
SpeedDDR4 2933 (PC4 23400)
CAS Latency21
Voltage1.2V
ECCYes
Buffered/RegisteredRegistered
Rank8Rx4
Heat SpreaderNo

Preguntas sobre este artículo

How do I install this 288-pin DDR4 RDIMM and what step is often missed?

Power down the server, open the chassis, align the 288-pin key notch with the slot, press firmly until both locking tabs click, then verify in BIOS that the module runs at 2933 MHz and shows 128GB capacity.

What maintenance or replacement will this 128GB ECC registered module need over time?

No scheduled maintenance is required; ECC corrects single-bit errors on the fly, and the module should only be replaced if the system logs uncorrectable errors or if a capacity upgrade is needed later.

What limit appears first when this RDIMM runs at 2933 MHz under sustained load?

The registered buffer and 1.2 V operation keep signal integrity stable, so the first limit is typically the platform's maximum supported memory capacity or memory-controller thermal envelope, not the module itself.

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