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Two green DDR4 DIMMs with black heat spreaders and gold contacts

Black Diamond Memory

Black Diamond Memory BD64GX22666MQR96 128GB (2 x 64GB) DDR4 2666 ECC Registered server RAM

SKU CH-TYMK-R7T07 MPN BD64GX22666MQR96

ECC Registered DDR4 2666 kit delivers 128GB (2 × 64GB) for server workloads

  • Total capacity128 GB (2 × 64 GB)
  • Rated speedDDR4 2666 (PC4 21300)
  • Buffer typeRegistered
  • Memory rank4Rx4
  • Product type288-Pin DDR4 SDRAM
  • Key featuresWith decades of experience specializing in memory and server

Capacity 128GB (2 x 64GB)

Rank 4Rx4

  • 128 GB total capacity for memory-intensive workloads
  • Registered ECC design protects data integrity in servers
  • DDR4 2666 speed delivers 21300 MB/s bandwidth
  • 288-pin DDR4 form factor fits standard server slots
  • 4Rx4 organisation enables high-density 64 GB modules

Black Diamond Memory 128GB DDR4 2666 ECC

This 128GB kit delivers two 64GB DDR4 2666 modules built for enterprise servers and workstations. Registered ECC circuitry corrects single-bit errors and reduces electrical load on the memory controller, helping large-scale deployments maintain data integrity under sustained workloads.

Suited For And Not Suited

The 4Rx4 registered DIMMs suit multi-socket servers and virtualization hosts that require high capacity per slot and error correction. Builders of standard desktops, consumer laptops or gaming rigs should look elsewhere because unbuffered non-ECC memory is required for those platforms.

Deciding Specification 288-Pin DDR4 2666

The 288-pin DDR4 2666 registered ECC interface is the single detail that determines compatibility; only motherboards with DDR4 registered DIMM slots and chipset support for 4Rx4 modules can use this kit.

How it compares

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

Price $2,190.99
Pricier than about 88% of the 6,523 comparable items (median $188.99).
Total capacity 128 GB (2 × 64 GB)
Higher than about 90% of the 6,064 comparable items (median 32 GB).
Price per GB $17.12 per GB
Pricier than about 77% of the 6,064 comparable items (median $7.25 per GB).

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Specifications

Product
Brand nameBlack Diamond Memory
Model nameBD64GX22666MQR96
Total capacity128 GB (2 × 64 GB)
Product type288-Pin DDR4 SDRAM
Performance
Rated speedDDR4 2666 (PC4 21300)
Memory
ECC supportYes
Buffer typeRegistered
Memory rank4Rx4
Size & build
Shipping weight0.18 kg
Package size178 × 51 × 13 mm

Other versions of this model

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Questions about this item

What does the 2666 speed mean once this memory is installed in a server?

The modules run at DDR4 2666, delivering a peak data rate of PC4 21300 when the platform operates at the rated frequency.

How does the registered ECC design affect what the memory controller can do?

Registered buffering reduces electrical load on the memory controller, while ECC detects and corrects single-bit errors to maintain data integrity.

Will the 288-pin 4Rx4 modules fit in a standard DDR4 DIMM slot?

Yes, the 288-pin DDR4 form factor matches standard server DIMM sockets; the 4Rx4 organisation is handled by the memory controller.

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