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Green rectangular DDR4 server memory module with gold contacts and black chips, no heat spreader

OWC

OWC 16GB DDR4 2666MHz PC4-21300 ECC Registered RDIMM 288-Pin 2Rx8 1.2V Server RAM

SKU CH-Y160-JCMCT

16 GB DDR4 2666 MHz ECC registered RDIMM for servers, workstations and NAS systems, backward compatible with 2133 MHz and 2400 MHz speeds

  • Capacity16GB
  • Type288-Pin DDR4 ECC RDIMM
  • SpeedDDR4 2666 (PC4 21300)
  • CAS LatencyCL19
  • Voltage1.2V
  • ECCYes
  • 16GB capacity expands server memory for larger workloads
  • DDR4 2666MHz PC4-21300 speed delivers high data throughput
  • ECC registered design corrects errors for reliable operation
  • 2V voltage reduces power draw in dense configurations
  • Backward compatible with 2133MHz and 2400MHz systems

Server ECC RDIMM 16GB

This 16GB DDR4 module runs at 2666MHz with CL19 latency and 1.2V power. It is a registered ECC RDIMM built for servers, workstations and NAS systems that require error-correcting registered memory. The dual-rank 2Rx8 design fits 288-pin DDR4 slots. It will not work in standard desktop computers or alongside unbuffered modules.

Thermals and power at 1.2V

Operating at the standard DDR4 voltage of 1.2V keeps power draw low and heat output minimal in typical server workloads. The module has no heat spreader, relying on chassis airflow for cooling. Registered buffering adds slight electrical load but reduces signal stress on the memory controller during normal operation.

Sustained load behaviour

Under continuous use the registered design maintains signal integrity across all ranks, while ECC corrects single-bit errors without halting the system. Backward compatibility with 2133MHz and 2400MHz buses allows stable operation if the platform downclocks the module. JEDEC compliance ensures consistent timing at rated speed during extended sessions.

Highlights

  • 16GB capacity expands server memory for larger workloads
  • DDR4 2666MHz PC4-21300 speed delivers high data throughput
  • ECC registered design corrects errors for reliable operation
  • 2V voltage reduces power draw in dense configurations
  • Backward compatible with 2133MHz and 2400MHz systems

Specifications

BrandOWC
Part Number2R6D42R816GB
Capacity16GB
Type288-Pin DDR4 ECC RDIMM
SpeedDDR4 2666 (PC4 21300)
CAS LatencyCL19
Voltage1.2V
ECCYes
Buffered/RegisteredRegistered
Rank2Rx8
Heat SpreaderNo

Questions about this item

How do I install the 288-Pin DDR4 ECC RDIMM and what step is often missed?

Align the notch on the 288-pin module with the slot key, press down evenly until both retention clips click, and verify the system runs at 2666MHz rather than falling back to 2133MHz or 2400MHz.

What maintenance or replacement will the 16GB 2Rx8 registered module need later?

No routine maintenance is required; if a memory error appears, replace the faulty 16GB RDIMM with an identical 2Rx8 CL19 1.2V module to keep ECC registered operation intact.

What limit appears first when the CL19 1.2V RDIMM runs under sustained load?

The registered buffer adds one cycle of latency, so the CL19 timing at 2666MHz becomes the throughput ceiling before voltage or thermal limits are reached.

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