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Four green DDR5 RDIMM modules with black heat spreaders and gold contacts

A-Tech

A-Tech 512GB (4x128GB) DDR5 4800 EC8 RDIMM 2S2Rx4 3DS Server RAM

SKU CH-9FRN-9RVBZ

A 512 GB quad-channel kit of four 128 GB DDR5 4800 EC8 RDIMM modules with ECC and CL40 latency for servers and workstations

  • Total capacity512 GB (4 × 128 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor Brand Chipset
  • CAS latencyCL40
  • Rated voltage1.1 V
  • Buffer typeRegistered

Capacity 512GB (4 x 128GB)

  • 512GB total capacity from four 128GB modules enables massive memory configurations for virtualisation and databases
  • DDR5 4800 speed with CL40 latency accelerates data throughput for compute-intensive workloads
  • EC8 registered ECC with 3DS/TSV technology corrects errors and stacks ranks for maximum density
  • 10V DDR5 standard voltage reduces power draw while maintaining high-frequency operation
  • Quad-channel kit ensures matched modules for optimal bandwidth on compatible server platforms

512GB DDR5 4800 RDIMM Kit

This 512GB kit contains four 128GB DDR5 4800 registered DIMMs built for servers and workstations that require ECC registered memory. It uses a 288-pin form factor and operates at the standard 1.10V DDR5 voltage. The modules are not compatible with desktop or laptop computers.

DDR5 4800 Registered ECC Limits

DDR5 4800 registered ECC memory only works in platforms with a DDR5 RDIMM memory controller and BIOS support for quad-rank 3DS modules. The registered buffer adds one cycle of latency compared to unbuffered DIMMs, and the 4800 MT/s data rate is the baseline JEDEC speed for DDR5. Mixing with other speeds or ranks may prevent the system from posting.

Quad-Rank 3DS Density

Each 128GB module uses a 2S2Rx4 (4Rx4) 3DS/TSV architecture, presenting four logical ranks per DIMM to the memory controller. This high rank count maximises capacity per slot but requires a platform qualified for 3DS quad-rank RDIMMs. Systems limited to dual-rank or single-rank modules cannot use this kit.

How it compares

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

Price $14,717.99
Pricier than about 92% 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 $28.75 per GB
Pricier than about 90% of the 6,064 comparable items (median $7.25 per GB).

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Specifications

Product
Brand nameA-Tech
Product lineA-Tech DDR5 Server Memory RAM
Model nameA-Tech 128 GB 2S2Rx4 PC5-4800B-R EC8
Total capacity512 GB (4 × 128 GB)
Performance
Rated speedDDR5 4800 (PC5 38400)
Processor
ChipsetMajor Brand Chipset
Memory
CAS latencyCL40
ECC supportYes
Buffer typeRegistered
Memory rank2S2Rx4 (4Rx4 3DS/TSV)
Kit configurationQuad Channel Kit
Power
Rated voltage1.1 V

Other versions of this model

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Questions about this item

Should I choose the 4 x 128 GB kit or a different capacity for my server?

This kit provides 512 GB total across four 128 GB modules. Select it if your platform supports 128 GB RDIMMs and you need the maximum capacity this configuration offers.

What does the DDR5 4800 speed rating deliver in a real server workload?

The modules run at 4800 MT/s with CL40 latency at 1.10 V, giving high throughput for memory-intensive tasks while the registered buffer and ECC maintain data integrity under load.

How does the EC8 RDIMM 288-pin interface limit performance in practice?

The 288-pin RDIMM slot caps the module at the DDR5 4800 standard; the registered design adds one cycle of buffering, and the quad-rank 3DS layout fits four ranks into one socket without exceeding the platform's electrical limits.

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