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

OWC

OWC 64GB DDR4 2666MHz CL19 ECC Registered RDIMM 2Rx4 2R6D42R464GB

SKU CH-KD8X-C07A0

64GB DDR4 ECC registered RDIMM running at 2666MHz CL19 for Supermicro X11SRA series servers

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

Capacity 64GB

  • 64GB capacity supports demanding server workloads
  • DDR4 2666MHz speed delivers responsive data throughput
  • CL19 latency with 1.2V operation balances performance and efficiency
  • ECC registered design protects data integrity in critical applications
  • Validated for Supermicro X11SRA series motherboards

OWC 64GB DDR4 2666MHz ECC RDIMM

This 64GB DDR4 2666MHz CL19 ECC registered RDIMM operates at 1.2V and uses a 288-pin 2Rx4 layout. It is designed for Supermicro X11SRA, X11SRA-F and X11SRA-RF motherboards in server, workstation and NAS systems. The module replaces Supermicro part MEMDR464LSL03ER26 and provides error-correcting registered memory for mission-critical workloads.

Verify registered ECC support and slot availability

Confirm that your motherboard accepts DDR4 registered ECC RDIMMs and that you have free 288-pin DIMM slots. This memory will not work in standard desktop boards or in systems that require unbuffered non-ECC modules. It cannot be mixed with unbuffered memory and requires a platform that explicitly supports registered ECC operation at 2666MHz, 2400MHz or 2133MHz.

Fits Supermicro X11SRA series server builds

The module installs directly into compatible Supermicro X11SRA, X11SRA-F or X11SRA-RF motherboards without adapters. It adds 64GB of registered ECC capacity per DIMM, freeing other slots for additional modules and extending the service life of existing server infrastructure. JEDEC and RoHS compliance ensures a standards-based upgrade path for compatible workstation and NAS platforms.

How it compares

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

Price $369.99
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 $5.78 per GB
Cheaper than about 67% 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
Compatibility
Compatible systemsSupermicro Motherboard X11SRA
Supermicro Motherboard X11SRA-F
Supermicro Motherboard X11SRA-RF

Other versions of this model

5 more in the same range

Questions about this item

What does the box contain and do I need any extra parts for a Supermicro X11SRA board?

The package includes one 64GB DDR4 2666MHz CL19 ECC registered RDIMM; no extra cables, brackets or cooling are required for installation in a Supermicro X11SRA, X11SRA-F or X11SRA-RF system.

The listing shows a single 64GB 2Rx4 module — when would I choose this instead of a lower-capacity kit?

Select this 64GB 2Rx4 RDIMM when your Supermicro X11SRA-series board has free 288-pin slots and you need maximum capacity per slot for virtualization, large databases or memory-intensive workloads.

What does the 2666MHz CL19 rating deliver once the module is running in a server?

At 2666MHz with CL19 timing the module provides PC4-21300 bandwidth and ECC error correction, and it will also operate at 2400MHz or 2133MHz if the platform requires a lower speed.

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