We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Green 288-pin DDR4 DIMM with black chips and silver heatsink

Black Diamond Memory

Black Diamond Memory BD128G2666MQR96 128GB DDR4 2666 ECC Registered server RAM

SKU CH-W45H-00W9K MPN BD128G2666MQR96

128 GB DDR4 2666 ECC registered server memory with 288-pin 4Rx4 design

  • Capacity128GB
  • Type288-Pin DDR4 SDRAM
  • SpeedDDR4 2666 (PC4 21300)
  • ECCYes
  • Buffered/RegisteredRegistered
  • Rank4Rx4

Capacity 128GB

Struck-through versions exist but are not stocked here.

Rank 4Rx4

  • 128 GB capacity supports large datasets
  • DDR4 2666 speed delivers 21300 bandwidth
  • ECC registered design protects data integrity
  • 4Rx4 rank organisation maximises density
  • 288-pin DDR4 form factor fits server slots

128GB DDR4 2666 ECC Registered Module

This 128GB DDR4 2666 (PC4 21300) module delivers high-capacity, error-correcting memory for enterprise servers. It uses a 288-pin registered design with a 4Rx4 rank structure to maintain signal integrity on heavily populated motherboards. The specification suits workloads that demand maximum density per slot.

Suited for registered ECC platforms only

The registered buffer and ECC function require a server-class memory controller; desktop or consumer boards that accept only unbuffered non-ECC UDIMMs cannot use this module. Buyers who need standard desktop memory should look at unbuffered alternatives instead.

4Rx4 rank configuration decides slot population

The quad-rank 4Rx4 organisation increases electrical load on each channel, so the motherboard’s qualified-vendor list and maximum rank-per-channel limit determine whether this 128GB stick can be installed alongside other modules.

Highlights

  • 128 GB capacity supports large datasets
  • DDR4 2666 speed delivers 21300 bandwidth
  • ECC registered design protects data integrity
  • 4Rx4 rank organisation maximises density
  • 288-pin DDR4 form factor fits server slots

Specifications

BrandBlack Diamond Memory
ModelBD128G2666MQR96
Capacity128GB
Type288-Pin DDR4 SDRAM
SpeedDDR4 2666 (PC4 21300)
ECCYes
Buffered/RegisteredRegistered
Rank4Rx4
FeaturesWith decades of experience specializing in memory and server parts, Black Diamond Memory is a proven manufacturer in the industry. Our products currently support over 200,000 configurations as well as support for enterprise servers, desktops, laptops, and a large variety of other devices.
Shipping weight0.18 kg
Package size178 × 51 × 13 mm

Other versions of this model

5 more in the same range

Same family, different memory, cooler or clock — compare before you commit.

Questions about this item

Does the 288-pin DDR4 module fit my server's registered DIMM slots?

Yes, the 288-pin DDR4 form factor matches standard registered server DIMM slots that accept DDR4 2666 ECC memory.

What BIOS setting is often missed when installing 4Rx4 registered ECC modules?

Enable ECC and registered mode in the BIOS; some platforms default to unbuffered operation and will not recognise the 4Rx4 modules without it.

When should I consider replacing these 128GB DDR4 2666 sticks?

Replace them if memory diagnostics report correctable ECC errors that increase over time, or when upgrading to a platform that requires a newer DDR generation.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.