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Two green 288-pin DDR5 RDIMM modules, no heat spreader, 128GB kit

A-Tech

A-Tech 128GB (2x64GB) DDR5 6400 EC8 RDIMM 2Rx4 server RAM

SKU CH-HSAK-3PWA9

Two 64 GB DDR5 6400 registered ECC modules add 128 GB of server-grade capacity with dual-rank x4 organisation and 1.10 V operation

  • Capacity128GB (2 x 64GB)
  • Type288-Pin DDR5 SDRAM
  • SpeedDDR5 6400 (PC5 51200)
  • Voltage1.10V
  • ECCYes
  • Buffered/RegisteredRegistered

Capacity 128GB (2 x 64GB)

  • 128 GB total capacity from two 64 GB modules
  • DDR5 6400 speed rated at PC5-51200
  • ECC registered EC8 RDIMM protects data integrity
  • Dual-rank 2Rx4 organisation for higher density
  • Standard 1.10 V DDR5 voltage for efficiency

Capacity and configuration

This kit supplies 128GB of DDR5 memory across two 64GB modules. It uses a dual-channel layout with a 2Rx4 dual-rank design and EC8 ECC registered DIMMs. The modules run at 6400 MHz with a standard 1.10V voltage and fit 288-pin server slots.

Server and workstation upgrades only

The memory is built for DDR5 servers and workstations that accept 64GB EC8 RDIMM modules. It will not work in desktop or laptop systems, nor in platforms that require unbuffered or non-ECC DIMMs. Buyers needing consumer memory or lower-capacity registered sticks should look elsewhere.

Workload headroom and limits

The 128GB total capacity handles virtualization, large databases and multi-tenant workloads with comfortable headroom. The 6400 MHz speed supports high-throughput tasks, though memory-bound applications that scale beyond 128GB will require additional DIMM slots or higher-density modules. The dual-rank layout maximises density per channel within the kit.

Privalumai

  • 128 GB total capacity from two 64 GB modules
  • DDR5 6400 speed rated at PC5-51200
  • ECC registered EC8 RDIMM protects data integrity
  • Dual-rank 2Rx4 organisation for higher density
  • Standard 1.10 V DDR5 voltage for efficiency

Specifikacijos

BrandA-Tech
SeriesA-Tech DDR5 Server Memory RAM
ModelA-Tech 64GB 2Rx4 PC5-6400B-R EC8
Part NumberAT64G2D5D6400RD4EC8N11V
Capacity128GB (2 x 64GB)
Type288-Pin DDR5 SDRAM
SpeedDDR5 6400 (PC5 51200)
Voltage1.10V
ECCYes
Buffered/RegisteredRegistered
Rank2Rx4
Multi-channel KitDual Channel Kit
ChipsetMajor Brand Chipset
Heat SpreaderNo
FeaturesMajor Brand Chips / Error Correcting Technology for Server Systems

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Will my motherboard need DDR5 slots and registered ECC support to run this 2Rx4 kit?

Yes — this is a DDR5 288-pin RDIMM with ECC, so the platform must provide DDR5 registered DIMM slots and enable ECC in firmware.

How do these 6400 MHz modules interact with slower DDR5 speeds the board might default to?

They will down-clock to the highest common speed the memory controller negotiates, maintaining ECC and registered operation.

What should I check in BIOS to confirm the kit is running at 6400 MT/s with ECC active?

Verify the memory frequency reads 6400 MT/s, the ECC status shows enabled, and both 64 GB modules are detected for 128 GB total.

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