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

OWC

OWC 8GB DDR4 2666 ECC Registered RDIMM CL19 1Rx4 1.2V server RAM

SKU CH-NHNV-PPDBM

8 GB DDR4 2666 MHz ECC registered RDIMM for Synology FS6400 and HD6500, CL19 1Rx4 1.2 V 288-pin module

  • Total capacity8 GB
  • Rated speedDDR4 2666 (PC4 21300)
  • CAS latencyCL19
  • Rated voltage1.2 V
  • Buffer typeRegistered
  • Memory rank1Rx4

Capacity 8GB

Rank 1Rx4

  • ECC registered design protects data integrity in servers
  • 2666 MHz DDR4 speed handles demanding workloads
  • Single 8 GB 1Rx4 module simplifies capacity planning
  • 2 V operation reduces power draw and heat
  • Compatible with Synology FS6400 and HD6500 NAS systems

Server ECC Registered RDIMM

This 8GB DDR4 module is built for servers, workstations and NAS systems that require registered ECC memory. It will not work in standard desktop computers and cannot be mixed with unbuffered or load-reduced DIMMs. The single-rank 1Rx4 design fits a single 288-pin slot.

288-pin DDR4 slot compatibility

The stick installs into a standard DDR4 RDIMM slot running at 1.2V and operates at 2666 MHz with CL19 latency. It is backward compatible with 2133 MHz and 2400 MHz bus speeds, allowing it to slot into existing platforms without BIOS changes. No heat spreader is present, so airflow in the chassis handles cooling.

8GB capacity for ECC workloads

The 8GB density suits entry-level virtualization, file-serving and database caching where error correction is mandatory. Larger datasets or heavy multi-VM deployments will exceed this capacity and require additional modules or higher-density DIMMs. The JEDEC-standard PC4-21300 rating guarantees warranted operation within spec.

How it compares

Measured against everything we stock in ECC Server RAM, at today’s prices. Recalculated every night.

Price $75.99
Cheaper than about 76% of the 6,523 comparable items (median $188.99).
Total capacity 8 GB
Lower than about 80% of the 6,064 comparable items (median 32 GB).
Price per GB $9.50 per GB
Pricier than about 65% of the 6,064 comparable items (median $7.25 per GB).

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Specifications

Product
Brand nameOWC
Part number2R6D41R408 GB
Total capacity8 GB
Product type288-Pin DDR4 SDRAM
Performance
Rated speedDDR4 2666 (PC4 21300)
Memory
CAS latencyCL19
ECC supportYes
Buffer typeRegistered
Memory rank1Rx4
Heat spreaderNo
Power
Rated voltage1.2 V

Other versions of this model

5 more in the same range

Questions about this item

How many 288-pin DDR4 2666 ECC Registered RDIMM slots does my Synology FS6400 or HD6500 have for this 8 GB module?

The OWC 2R6D41R408GB is a single 8 GB DDR4 2666 CL19 1Rx4 1.2 V ECC Registered DIMM; the number of usable slots depends on the specific Synology model and its memory configuration.

Does the 1.2 V DDR4 2666 ECC Registered module run hot or loud inside a Synology FS6400 or HD6500?

The module has no heat spreader and draws 1.2 V; thermal and acoustic behaviour is determined by the NAS chassis airflow and fan profile, not by the DIMM itself.

What must my system already provide for this 288-pin DDR4 2666 ECC Registered RDIMM to work?

A server, workstation or NAS motherboard with DDR4 ECC Registered DIMM slots that accept 1Rx4 modules at 2666, 2400 or 2133 MHz and 1.2 V operation.

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