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

OWC

OWC 128GB (2x64GB) DDR4 2666MHz CL19 ECC Registered RDIMM 1.2V 288-pin Server RAM

SKU CH-40QK-5JBH3

Dual-channel 128 GB DDR4-2666 ECC registered RDIMM kit for servers and workstations

  • Capacity128GB (2 x 64GB)
  • Type288-Pin DDR4 ECC RDIMM
  • SpeedDDR4 2666 (PC4 21300)
  • CAS LatencyCL19
  • Voltage1.2V
  • ECCYes

Capacity 128GB (2 x 64GB)

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Rank 2Rx4

  • 128GB total capacity from two 64GB modules for high-density server workloads
  • ECC registered design detects and corrects data errors to protect critical applications
  • DDR4 2666MHz CL19 speed delivers responsive throughput for demanding tasks
  • Low 1.2V operation reduces power draw and heat in dense configurations
  • Backward compatible with 2133MHz and 2400MHz systems for flexible deployment

Server ECC RDIMM Upgrade

This OWC kit delivers 128 GB of DDR4 ECC registered memory in a matched pair of 64 GB modules. It is built for servers, workstations and NAS systems that require registered DIMMs with error correction. Standard desktop boards cannot use this memory. Mixing it with unbuffered DIMMs is not supported.

Dual Channel 288 Pin Kit

The two modules populate a dual channel configuration on 288 pin DDR4 slots running at 1.2 V. Backward compatibility lets the kit operate at 2133 MHz or 2400 MHz if the platform requires a lower speed. No heat spreader is fitted so clearance inside dense chassis is maximised.

128 GB Registered Capacity

Each 2Rx4 rank module provides 64 GB giving a total of 128 GB for memory intensive workloads such as virtualisation or large datasets. The CL19 latency at 2666 MHz (PC4 21300) delivers stable throughput within JEDEC limits. Systems needing more than 128 GB or unbuffered memory must look elsewhere.

Points forts

  • 128GB total capacity from two 64GB modules for high-density server workloads
  • ECC registered design detects and corrects data errors to protect critical applications
  • DDR4 2666MHz CL19 speed delivers responsive throughput for demanding tasks
  • Low 1.2V operation reduces power draw and heat in dense configurations
  • Backward compatible with 2133MHz and 2400MHz systems for flexible deployment

Caractéristiques

BrandOWC
Part Number2R6D42R4128P
Capacity128GB (2 x 64GB)
Type288-Pin DDR4 ECC RDIMM
SpeedDDR4 2666 (PC4 21300)
CAS LatencyCL19
Voltage1.2V
ECCYes
Buffered/RegisteredRegistered
Rank2Rx4
Multi-channel KitDual Channel Kit
Heat SpreaderNo

Autres versions de ce modèle

5 de plus dans cette gamme

Même famille, mémoire, ventirad ou fréquence différents — comparez avant de vous décider.

Questions sur cet article

How does the CL19 latency affect sustained throughput on this DDR4 2666MHz kit?

CL19 is the CAS latency at 2666MHz; each access cycle takes 19 clocks, so sustained bandwidth is governed by the PC4-21300 rating and the registered buffer.

What thermal or power behaviour should I expect when these 1.2V registered modules run continuously in a server?

The 1.2V DDR4 RDIMMs draw standard registered DIMM power; with no heat spreader fitted, airflow across the 288-pin slots is the primary cooling path.

Which existing hardware must my system already provide for this 2Rx4 ECC registered kit to function?

A server, workstation or NAS motherboard with DDR4 RDIMM slots, ECC support and a memory controller that accepts 2Rx4 registered modules at 2666, 2400 or 2133MHz.

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