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Green DDR4 RDIMM module with black chips, no heat spreader

OWC

OWC 16GB DDR4 3200 ECC Registered RDIMM CL22 2Rx8 1.2V 288-pin

SKU CH-3KJ5-WNE3H

16 GB DDR4-3200 ECC registered RDIMM for QNAP TDS-h2489FU, TVS-h474, TVS-h674, TVS-h874 and TS-1655

  • Capacity16GB
  • Type288-Pin DDR4 ECC RDIMM
  • SpeedDDR4 3200 (PC4 25600)
  • CAS LatencyCL22
  • Voltage1.2V
  • ECCYes
  • ECC registered design protects data integrity in server workloads
  • 3200 MT/s DDR4 speed matches QNAP system specifications
  • 16 GB capacity in a single 2Rx8 module
  • 2 V operation reduces power draw in dense configurations
  • Validated for QNAP TDS-h2489FU, TVS-h474, TVS-h674, TVS-h874 and TS-1655

16GB ECC Registered DDR4 Module

This OWC 16GB DDR4 3200 ECC Registered RDIMM is built for QNAP NAS models including the TDS-h2489FU TVS-h474 TVS-h674 TVS-h874 and TS-1655. It delivers 16GB capacity at DDR4 3200 speed with CL22 latency and 1.2V operation. The 288-pin 2Rx8 registered design provides error correction for data integrity in server workloads.

Suited for QNAP NAS expansion; not for desktops

This module suits administrators upgrading the listed QNAP systems to increase memory capacity for virtualization or heavy file serving. It will not work in standard desktop computers or consumer motherboards because it requires registered ECC support. Builders needing unbuffered memory or non-ECC modules should look elsewhere as mixing registered with unbuffered memory is not supported.

Steady throughput under sustained server loads

Under continuous operation the registered buffer reduces electrical load on the memory controller helping maintain stable timings during long backup or virtualization tasks. ECC detection corrects single-bit errors on the fly preventing silent data corruption during extended uptime. The JEDEC compliant 1.2V DDR4 3200 specification ensures consistent bandwidth without thermal throttling in enclosed NAS chassis.

Highlights

  • ECC registered design protects data integrity in server workloads
  • 3200 MT/s DDR4 speed matches QNAP system specifications
  • 16 GB capacity in a single 2Rx8 module
  • 2 V operation reduces power draw in dense configurations
  • Validated for QNAP TDS-h2489FU, TVS-h474, TVS-h674, TVS-h874 and TS-1655

Specifications

BrandOWC
Part Number3R2D42R816GB
Capacity16GB
Type288-Pin DDR4 ECC RDIMM
SpeedDDR4 3200 (PC4 25600)
CAS LatencyCL22
Voltage1.2V
ECCYes
Buffered/RegisteredRegistered
Rank2Rx8
Heat SpreaderNo
Compatible SystemQNAP TDS-h2489FU
QNAP TVS-h474
QNAP TVS-h674
QNAP TVS-h874
QNAP TS-1655

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Questions about this item

Will this registered ECC RDIMM work alongside unbuffered memory already installed in my QNAP TVS-h674?

No — the module is registered ECC and cannot be mixed with unbuffered DIMMs; all slots must use registered ECC memory for the system to operate correctly.

What must my QNAP TS-1655 already support for this 16 GB DDR4 3200 CL22 2Rx8 1.2 V 288-pin RDIMM to function?

The NAS must accept DDR4 3200 registered ECC RDIMMs with 2Rx8 organisation; the listed QNAP models are validated for this exact specification.

How can I confirm the 16 GB module is running at DDR4 3200 with ECC active after installation?

Check the QNAP system information or resource monitor — it will show 16 GB at 3200 MT/s and report ECC status as enabled when the module is recognised.

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