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Green rectangular circuit board with gold edge contacts and black memory chips, no heat spreader

OWC

OWC 128GB DDR4 2666 CL19 8Rx4 288-pin 1.2V ECC Registered RDIMM server RAM

SKU CH-1789-KPRAE

A single 128GB DDR4 2666 CL19 8Rx4 288-pin 1.2V ECC Registered RDIMM for servers, workstations and NAS systems

  • Capacity128GB
  • Type288-Pin DDR4 ECC RDIMM
  • SpeedDDR4 2666 (PC4 21300)
  • CAS Latency19
  • Voltage1.2V
  • ECCYes
  • 128GB single-module capacity simplifies server upgrades
  • ECC registered design protects data integrity in critical workloads
  • 2666MHz DDR4 speed with CL19 latency balances throughput and response
  • 2V operation reduces power draw in dense configurations
  • JEDEC and RoHS compliant for warranty-safe deployment

Server-grade ECC RDIMM for workstations

This 128 GB DDR4-2666 module is built for servers, workstations and NAS systems that require registered ECC memory. It operates at PC4-21300 with a CAS latency of 19 and runs at the standard 1.2 V. The single DIMM delivers high density in one slot, making it suitable for memory-intensive workloads on compatible platforms.

Registered design with JEDEC compliance

The 288-pin RDIMM uses an 8Rx4 organisation and includes no heat spreader, keeping the profile low for dense server chassis. JEDEC and RoHS compliance ensures a warranty-safe upgrade that meets OEM specifications. Backward compatibility with 2133 MHz and 2400 MHz systems allows the module to clock down automatically when installed in slower platforms.

Replaces lower-capacity registered DIMMs

The upgrade is worthwhile when a system supports 128 GB registered modules and the workload benefits from fewer occupied slots. It cannot be used in standard desktop computers or mixed with unbuffered or load-reduced ECC memory. Buyers needing unbuffered DIMMs or higher-speed registered kits should look elsewhere.

Points forts

  • 128GB single-module capacity simplifies server upgrades
  • ECC registered design protects data integrity in critical workloads
  • 2666MHz DDR4 speed with CL19 latency balances throughput and response
  • 2V operation reduces power draw in dense configurations
  • JEDEC and RoHS compliant for warranty-safe deployment

Caractéristiques

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

Questions sur cet article

Does DDR4 2666 PC4-21300 limit the memory bus to 2666 MT/s?

Yes, the module runs at 2666 MT/s and will down-clock to 2133 or 2400 if the platform requires it.

What slot and clearance does the 288-pin 8Rx4 RDIMM need?

It fits a standard DDR4 288-pin RDIMM slot; no heat spreader means low-profile clearance is sufficient.

How is the ECC Registered DIMM installed and what step is often missed?

Align the notch, press firmly until the retention clips click, then verify the system registers the full 128 GB and ECC mode in BIOS.

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