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

OWC

OWC 128GB DDR4 2666 CL19 8Rx4 ECC RDIMM memory upgrade

SKU CH-DZS9-V1HMS

128GB DDR4 2666 CL19 ECC Registered RDIMM for Supermicro H11DSi, H11DSi-NT, H11DST-B, H11DSU-iN and H11SSL-C motherboards

  • Total capacity128 GB
  • Rated speedDDR4 2666 (PC4 21300)
  • CAS latency19
  • Rated voltage1.2 V
  • Buffer typeRegistered
  • Memory rank8Rx4
  • 128 GB single-module capacity simplifies server upgrades
  • DDR4 2666 CL19 speed handles demanding workloads
  • ECC registered design protects data integrity in critical systems
  • 2 V operation reduces power draw and heat
  • Validated for Supermicro H11DSi, H11DSi-NT, H11DST-B, H11DSU-iN, H11SSL-C

Server-grade capacity

This 128GB DDR4 2666 CL19 8Rx4 ECC RDIMM is a single registered module built for Supermicro H11DSi, H11DSi-NT, H11DST-B, H11DSU-iN and H11SSL-C motherboards. It operates at 1.2V and meets JEDEC PC4-21300 specifications for server and workstation platforms.

Workstation and server builds only

The module suits administrators expanding memory in compatible Supermicro systems or integrating high-density ECC registered DIMMs into validated server configurations. It will not work in standard desktop computers and cannot be mixed with unbuffered or load-reduced ECC memory types.

Sustained error-corrected throughput

Registered buffering and on-die ECC maintain data integrity during continuous multi-threaded workloads such as virtualisation, database serving or render farms. Backward compatibility with 2133MHz and 2400MHz clocks allows stable operation when the platform negotiates lower speeds under heavy sustained load.

How it compares

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

Price $634.99
Pricier than about 55% of the 21,161 comparable items (median $397.99).
Total capacity 128 GB
Higher than about 70% of the 20,941 comparable items (median 32 GB).
CAS latency 19
Lower than about 70% of the 483 comparable items (median 22).
Price per GB $4.96 per GB
Cheaper than about 77% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameOWC
Part number2R6D48R4128G
Total capacity128 GB
Product type288-Pin DDR4 ECC RDIMM
Performance
Rated speedDDR4 2666 (PC4 21300)
Memory
CAS latency19
ECC supportYes
Buffer typeRegistered
Memory rank8Rx4
Heat spreaderNo
Power
Rated voltage1.2 V
Compatibility
Compatible systemsSupermicro Motherboard H11DSi
Supermicro Motherboard H11DSi-NT
Supermicro Motherboard H11DST-B
Supermicro Motherboard H11DSU-iN
Supermicro Motherboard H11SSL-C

Questions about this item

Which motherboards must I already own for this 288-pin DDR4 2666 ECC RDIMM to work?

It is validated for Supermicro H11DSi, H11DSi-NT, H11DST-B, H11DSU-iN and H11SSL-C motherboards.

Can I keep my existing 2133 MHz or 2400 MHz DDR4 ECC registered modules alongside this 2666 MHz stick?

Yes, the module is backward compatible with 2133 MHz and 2400 MHz speeds, but all modules must be ECC registered — mixing with unbuffered or load-reduced memory is not supported.

How do I confirm the 128 GB 8Rx4 module is running at CL19 1.2 V after installation?

Check the BIOS or UEFI memory information screen; it should report 2666 MT/s, CAS latency 19, 1.2 V and 8Rx4 organisation for the installed DIMM.

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