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Green 288-pin DDR4 ECC registered RDIMM module, no heat spreader

OWC

OWC 64GB DDR4 2666MHz ECC Registered RDIMM 2Rx4 CL19 1.2V 288pin memory upgrade

SKU CH-935E-WYY80

64 GB DDR4 ECC Registered RDIMM at 2666 MHz CL19 for select Supermicro M11SDV server motherboards

  • Total capacity64 GB
  • Rated speedDDR4 2666 (PC4 21300)
  • CAS latencyCL19
  • Rated voltage1.2 V
  • Buffer typeRegistered
  • Memory rank2Rx4

Capacity 64GB

  • 64GB capacity expands server memory for heavy workloads
  • ECC registered design detects and corrects data errors automatically
  • DDR4 2666MHz CL19 speed delivers responsive performance at 1.2V
  • Validated for Supermicro M11SDV motherboards including 4C, 4CT, 8C+ and 8CT models
  • Backward compatible with 2133MHz and 2400MHz systems for flexible deployment

Server memory upgrade

This OWC module provides 64GB of DDR4 ECC registered memory for compatible Supermicro M11SDV motherboards. It is intended for administrators extending the life of existing server or workstation platforms that require registered DIMMs.

288-pin registered DIMM

The stick uses a standard 288-pin DDR4 form factor with ECC and registered buffering. It cannot be mixed with unbuffered memory and will not function in standard desktop systems that lack registered DIMM support.

Low-voltage operation

Rated at 1.2V with CL19 latency at 2666MHz, the module runs within JEDEC specifications for reduced power draw. Backward compatibility with 2133MHz and 2400MHz systems allows deployment in mixed-speed configurations.

How it compares

Measured against everything we stock in Model-Specific Memory Upgrades, at today’s prices. Recalculated every night.

Price $354.99
Typical for this category: the median of 21,161 items is $397.99.
Total capacity 64 GB
Higher than about 60% of the 20,941 comparable items (median 32 GB).
Price per GB $5.55 per GB
Cheaper than about 70% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameOWC
Part number2R6D42R464 GB
Total capacity64 GB
Product type288-Pin DDR4 ECC RDIMM
Performance
Rated speedDDR4 2666 (PC4 21300)
Memory
CAS latencyCL19
ECC supportYes
Buffer typeRegistered
Memory rank2Rx4
Heat spreaderNo
Power
Rated voltage1.2 V

Other versions of this model

5 more in the same range

Questions about this item

Does the DDR4-2666 ECC RDIMM run at 2666 MHz or drop to 2400 MHz on a 2400 MHz bus?

It operates at 2666 MHz on a 2666 MHz bus and will clock down to 2400 MHz or 2133 MHz if the platform runs at those lower speeds.

Will the 288-pin 64 GB registered module fit a Supermicro M11SDV motherboard with standard DIMM slots?

Yes, the 288-pin DDR4 RDIMM form factor matches the standard DDR4 DIMM sockets on the listed Supermicro M11SDV boards.

What is the correct order for populating the 2Rx4 ECC RDIMM in a four-slot Supermicro M11SDV board?

Install the module in the slot designated as Channel A DIMM 0 first, following the motherboard manual's population sequence for registered memory.

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