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Single green 288-pin DDR4 RDIMM module, bare chips, no heat spreader

OWC

OWC 128GB DDR4 2666 ECC Registered RDIMM 2R6D48R4128G

SKU CH-X33W-0493R

A 128GB DDR4 2666 ECC registered RDIMM with CL19 latency and 1.2V operation, built for the ASUS KNPA-U16 server motherboard

  • Capacity128GB
  • Type288-Pin DDR4 ECC RDIMM
  • SpeedDDR4 2666 (PC4 21300)
  • CAS Latency19
  • Voltage1.2V
  • ECCYes
  • 128 GB single-module capacity for high-density server memory
  • ECC registered design detects and corrects data errors in critical workloads
  • 2666 MHz DDR4 speed with CL19 latency for responsive performance
  • 2 V operation reduces power draw in dense configurations
  • Backward compatible with 2133 MHz and 2400 MHz systems

Server-grade ECC RDIMM

This OWC module delivers 128GB of DDR4 2666 registered ECC memory in a single 288-pin DIMM. It is built for ASUS KNPA-U16 server motherboards and similar workstation or NAS platforms that require registered modules with error correction. The 8Rx4 organisation and CL19 timing meet JEDEC PC4-21300 specifications at 1.2V.

Registered slot requirement

The module fits a standard DDR4 RDIMM slot and must not be mixed with unbuffered or load-reduced DIMMs. Systems that accept registered ECC memory can use this upgrade to populate a single channel, leaving remaining slots free for additional capacity. Backward compatibility with 2133MHz and 2400MHz buses allows deployment in older DDR4 platforms without configuration changes.

128GB single-module density

One stick provides 128GB, enabling high total memory when multiple slots are available. The registered buffer and ECC circuitry maintain data integrity under sustained server workloads such as virtualisation, databases or large-file processing. Workloads that exceed the module count supported by the motherboard will require a platform with more memory channels.

Puntos fuertes

  • 128 GB single-module capacity for high-density server memory
  • ECC registered design detects and corrects data errors in critical workloads
  • 2666 MHz DDR4 speed with CL19 latency for responsive performance
  • 2 V operation reduces power draw in dense configurations
  • Backward compatible with 2133 MHz and 2400 MHz systems

Especificaciones

BrandOWC
Part Number2R6D48R4128G
Capacity128GB
Type288-Pin DDR4 ECC RDIMM
SpeedDDR4 2666 (PC4 21300)
CAS Latency19
Voltage1.2V
ECCYes
Buffered/RegisteredRegistered
Rank8Rx4
Heat SpreaderNo
Compatible SystemASUS Server Motherboard KNPA-U16

Preguntas sobre este artículo

Will the 128GB DDR4 2666 module downclock automatically if my ASUS KNPA-U16 only supports 2133MHz or 2400MHz?

Yes, the module is backward compatible with 2133MHz and 2400MHz speeds and will run at the highest speed the motherboard allows.

How much power does the 1.2V ECC Registered RDIMM draw under continuous server workloads?

The module operates at the standard DDR4 voltage of 1.2V; total power draw scales with capacity and rank count but stays within JEDEC limits for registered DIMMs.

Does my ASUS KNPA-U16 motherboard need to support 8Rx4 registered ECC DIMMs for this 128GB module to work?

Yes, the board must accept 288-pin DDR4 ECC Registered memory with an 8Rx4 rank configuration; the KNPA-U16 is listed as a compatible system.

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