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Green circuit board with black memory chips and gold edge connectors

Black Diamond Memory

Black Diamond Memory BD128G2933MQR96 128GB DDR4 2933 ECC Registered server RAM

SKU CH-E4W8-GPNX9 MPN BD128G2933MQR96

128 GB DDR4 2933 ECC registered memory with 4Rx4 rank for high-density server workloads

  • Total capacity128 GB
  • Rated speedDDR4 2933 (PC4 23400)
  • Buffer typeRegistered
  • Memory rank4Rx4
  • Product type288-Pin DDR4 SDRAM
  • Key featuresWith decades of experience specializing in memory and server

Capacity 128GB

Rank 4Rx4

  • 128GB capacity supports large virtualised workloads
  • DDR4 2933 speed delivers high throughput for servers
  • ECC Registered design protects data integrity under load
  • 4Rx4 rank organisation maximises density per DIMM slot
  • 288-pin DDR4 form factor fits standard server boards

What this module is and who it serves

This is a 128GB DDR4 2933 ECC registered DIMM built for enterprise servers and workstations that require large memory capacity with error correction. The 4Rx4 organisation and registered buffer reduce electrical load on the memory controller, making the module suitable for multi-socket platforms running virtualisation, databases or high-performance computing workloads.

Who should consider it and who should not

Buyers deploying qualified server boards that support DDR4 2933 registered ECC memory will gain the full 128GB per slot. Systems limited to unbuffered non-ECC DDR4, consumer desktop chipsets or laptops cannot use this module. Workloads needing higher clock speeds or lower latency than PC4 23400 provides should evaluate faster-rated kits instead.

What the bundled items change

No accessories, software licences or cooling hardware are included with the memory sticks. The value comes from Black Diamond Memory’s validation across over 200,000 platform configurations, which simplifies qualification for IT teams managing heterogeneous server fleets.

How it compares

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

Price $2,388.99
Pricier than about 89% of the 6,523 comparable items (median $188.99).
Total capacity 128 GB
Higher than about 90% of the 6,064 comparable items (median 32 GB).
Price per GB $18.66 per GB
Pricier than about 79% of the 6,064 comparable items (median $7.25 per GB).

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Specifications

Product
Brand nameBlack Diamond Memory
Model nameBD128G2933MQR96
Total capacity128 GB
Product type288-Pin DDR4 SDRAM
Performance
Rated speedDDR4 2933 (PC4 23400)
Memory
ECC supportYes
Buffer typeRegistered
Memory rank4Rx4
Size & build
Shipping weight0.18 kg
Package size178 × 51 × 13 mm

Other versions of this model

5 more in the same range

Questions about this item

Does my server motherboard need 288-pin DDR4 slots to install this 128GB registered module?

Yes, this module uses the 288-pin DDR4 form factor, so the board must provide matching DDR4 DIMM slots for it to seat and function.

Can I mix this 4Rx4 registered ECC module with older registered ECC DDR4 modules in the same server?

Mixing ranks and speeds is possible on many platforms, but the memory controller will typically clock all modules to the lowest common speed and may impose population limits per channel.

How can I confirm the module is running at DDR4 2933 with ECC active after installation?

Check the BIOS memory information or use a tool such as dmidecode to verify the reported speed shows 2933 MT/s and the ECC status reads enabled for this 128GB module.

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