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Green 288-pin DDR4 RDIMM module with black chips, no heat spreader

OWC

OWC 2R6D42R816GB 16GB DDR4 2666MHz CL19 ECC Registered RDIMM memory upgrade

SKU CH-0E6P-A91WF

16 GB DDR4 2666 MHz CL19 ECC registered RDIMM for Supermicro X11SRA series servers

  • Capacity16GB
  • Type288-Pin DDR4 ECC RDIMM
  • SpeedDDR4 2666 (PC4 21300)
  • CAS LatencyCL19
  • Voltage1.2V
  • ECCYes

Capacity 16GB

  • ECC registered design protects data integrity in servers
  • 16GB capacity adds substantial memory for virtualisation workloads
  • 2666MHz DDR4 speed matches Supermicro X11SRA specifications
  • 2V operation reduces power draw in dense configurations
  • Backward compatible with 2133MHz and 2400MHz systems

Server memory upgrade

This 16GB DDR4 module is built for Supermicro X11SRA, X11SRA-F and X11SRA-RF motherboards. It delivers 2666MHz speed at CL19 latency with ECC and registered buffering for data integrity. The 1.2V DDR4 288-pin RDIMM is not compatible with standard desktop systems. It replaces several Supermicro part numbers including MEMDR416LCL06ER26 and MEMDR416LHL06ER26.

Thermals and power draw

Operating at 1.2V, the module draws low power and generates minimal heat without a heat spreader. Registered buffering reduces electrical load on the memory controller during sustained workloads. ECC operation adds a small overhead but maintains stability in continuous server use. The design suits 24/7 environments where thermal headroom is limited.

Build quality and connectors

The 288-pin RDIMM uses a 2Rx8 rank configuration and meets JEDEC and RoHS standards. Registered DIMMs cannot be mixed with unbuffered memory in the same system. Backward compatibility with 2133MHz and 2400MHz platforms allows flexible deployment. Each module is tested in-house before shipping to ensure reliable installation.

Highlights

  • ECC registered design protects data integrity in servers
  • 16GB capacity adds substantial memory for virtualisation workloads
  • 2666MHz DDR4 speed matches Supermicro X11SRA specifications
  • 2V operation 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
Compatible SystemSupermicro Motherboard X11SRA
Supermicro Motherboard X11SRA-F
Supermicro Motherboard X11SRA-RF

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Questions about this item

How do I install this 288-pin DDR4 ECC RDIMM in a Supermicro X11SRA motherboard, and what step is often missed?

Align the notch on the module with the slot key, press firmly until both retention clips click shut, and verify the BIOS recognises the full 16 GB at 2666 MHz — skipping the clip check is the most common error.

What maintenance or replacement will this registered ECC module need over its service life?

No scheduled maintenance is required; the module carries a limited lifetime warranty, so a replacement would only be needed if a memory test reports correctable ECC errors that exceed the platform threshold.

What limit appears first when this CL19 1.2 V RDIMM runs sustained workloads?

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

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