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Two green DDR4 server memory modules with gold contacts and black heat spreaders

Black Diamond Memory

Black Diamond Memory BD128GX22933MQR96 256GB (2 x 128GB) DDR4 2933 ECC Registered server RAM

SKU CH-Z4BS-RCKCH MPN BD128GX22933MQR96

256 GB dual-rank DDR4-2933 ECC registered server memory kit in a 288-pin form factor

  • Total capacity256 GB (2 × 128 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 256GB (2 x 128GB)

Rank 4Rx4

  • 256 GB total capacity from two 128 GB modules
  • DDR4 2933 speed rated at PC4 23400 bandwidth
  • ECC registered design detects and corrects memory errors
  • 4Rx4 rank organisation suits high-density server platforms
  • 288-pin DDR4 form factor fits standard server DIMM slots

Server Memory for Enterprise Workloads

This 256GB kit delivers 2 x 128GB DDR4 2933 modules built for registered ECC operation. The 4Rx4 organisation and PC4 23400 rating target multi-socket platforms that demand high density and error correction. Black Diamond Memory validates the kit across a broad range of server configurations.

Suited for Registered ECC Slots Only

Systems that require unbuffered non-ECC memory cannot use these modules. Workstations limited to lower capacities or consumer chipsets without registered support should look elsewhere. Buyers needing speeds above DDR4 2933 or different rank structures will not be served by this part.

4Rx4 Rank Determines Platform Compatibility

The quad-rank x4 organisation dictates how many modules a memory controller can address per channel. Verify the server documentation for maximum supported ranks before purchase. An incompatible rank count prevents the system from recognising the full 256GB capacity.

How it compares

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

Price $4,967.99
Pricier than about 90% of the 6,523 comparable items (median $188.99).
Total capacity 256 GB (2 × 128 GB)
Higher than about 90% of the 6,064 comparable items (median 32 GB).
Price per GB $19.41 per GB
Pricier than about 80% of the 6,064 comparable items (median $7.25 per GB).

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Specifications

Product
Brand nameBlack Diamond Memory
Model nameBD128GX22933MQR96
Total capacity256 GB (2 × 128 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 the 256GB kit ship as two 128GB modules or do I need to buy extra sticks?

The kit contains two 128GB DDR4 modules for a total of 256GB. No additional modules are required.

Should I pick the 2933 MT/s registered ECC version or a different speed for my server?

Choose DDR4 2933 (PC4 23400) registered ECC when your platform specifies that exact speed and registered signalling; otherwise match the speed and ECC type your motherboard requires.

What does the 4Rx4 rank layout mean once the memory is installed in a server?

Each 128GB module presents four ranks of x4 DRAM, giving the memory controller more ranks to interleave for higher bandwidth in multi-channel configurations.

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