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Four green DDR4 RDIMM modules with black heatspreaders and gold contacts

A-Tech

A-Tech 512GB (4x128GB) DDR4 2666 ECC RDIMM 2S4Rx4 3DS Server RAM

SKU CH-A1KP-8DENB

Quad-channel kit of four 128 GB DDR4 ECC registered DIMMs running at 2666 MHz with CL19 latency and 1.2 V operation

  • Total capacity512 GB (4 × 128 GB)
  • Rated speedDDR4 2666 (PC4 21300)
  • ChipsetMajor Brand Chipset
  • CAS latencyCL19
  • Rated voltage1.2 V
  • Buffer typeRegistered

Capacity 512GB (4 x 128GB)

  • 512 GB total capacity across four 128 GB modules for large server workloads
  • DDR4 2666 MHz speed rated at PC4-21300 for high throughput
  • ECC Registered RDIMM design detects and corrects data errors automatically
  • 2S4Rx4 octal-rank 3DS architecture packs maximum density per slot
  • 2 V standard DDR4 voltage keeps power draw low

512GB DDR4 2666 ECC RDIMM Kit

This 512GB kit contains four 128GB registered DIMMs built for DDR4 servers and workstations. Each module runs at 2666 MHz with CL19 latency and 1.20V operation. The octal-rank 3DS design targets systems that need maximum capacity per slot.

Sustained load behaviour

Registered buffering and on-die ECC keep data integrity stable during long compute runs or heavy virtualisation workloads. The 3DS stacking allows all four modules to populate a quad-channel controller without exceeding rank limits. Standard 1.2V power draw avoids extra thermal stress under continuous use.

Upgrade scope

The kit replaces lower-density RDIMM sets when the platform supports 128GB modules and 8Rx4 ranks per DIMM. It is not for desktops, laptops or any system limited to unbuffered memory. Verify the motherboard qualification list before installing.

How it compares

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

Price $2,244.99
Pricier than about 88% of the 6,523 comparable items (median $188.99).
Total capacity 512 GB (4 × 128 GB)
Higher than about 91% of the 6,064 comparable items (median 32 GB).
Price per GB $4.38 per GB
Cheaper than about 78% of the 6,064 comparable items (median $7.25 per GB).

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Specifications

Product
Brand nameA-Tech
Product lineA-Tech DDR4 Server Memory RAM
Model nameA-Tech 128 GB 2S4Rx4 PC4-2666 V-R
Total capacity512 GB (4 × 128 GB)
Performance
Rated speedDDR4 2666 (PC4 21300)
Processor
ChipsetMajor Brand Chipset
Memory
CAS latencyCL19
ECC supportYes
Buffer typeRegistered
Memory rank2S4Rx4 (8Rx4 3DS/TSV)
Kit configurationQuad Channel Kit
Power
Rated voltage1.2 V

Other versions of this model

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Questions about this item

How much heat and power draw should I expect from the 1.2 V DDR4 2666 registered modules when the server runs continuously?

Each 128 GB module operates at the standard DDR4 voltage of 1.2 V, so total power scales with the four-module kit; registered ECC RDIMMs add minimal overhead and run within normal server thermal envelopes for 2666 MHz CL19 parts.

What motherboard features are required for this 288-pin quad-channel 512 GB kit to function?

You need a server or workstation board with DDR4 RDIMM slots that support 2S4Rx4 3DS/TSV octal-rank modules, quad-channel architecture, and a maximum capacity of at least 512 GB across four DIMMs.

Can I mix these 2666 MHz CL19 3DS RDIMMs with lower-capacity registered ECC modules already in my system?

Mixing is possible only if the platform supports mixed-rank populations and the memory controller can train all ranks at a common 2666 MHz CL19 speed; otherwise the system will default to the lowest common denominator or fail to post.

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