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Six green circuit boards with black chips and gold contacts, 288-pin LRDIMM form factor

A-Tech

A-Tech 384GB (6×64GB) DDR4 2666 ECC LRDIMM for Mac Pro 2019 8-Core memory upgrade

SKU CH-M4DT-N1T1H

Six 64 GB DDR4 2666 ECC LRDIMM modules add 384 GB to the 2019 Mac Pro 8-Core

  • Total capacity384 GB (6 × 64 GB)
  • Rated speedDDR4 2666 (PC4 21300)
  • ChipsetMajor Brand Chipset
  • Rated voltage1.2 V
  • Buffer typeLoad Reduced
  • Compatible systemsApple Mac Systems
  • 384GB total capacity from six 64GB modules for heavy workloads
  • DDR4 2666/2667MHz speed matches Mac Pro 2019 specifications
  • ECC Load Reduced design protects data integrity under load
  • 288-pin LRDIMM form factor fits Apple Mac Pro 8-Core systems
  • Major-brand chips tested to stringent quality standards

384GB DDR4 2666 ECC LRDIMM kit

This 384GB kit contains six 64GB DDR4 2666 ECC Load Reduced DIMMs built for the 2019 Mac Pro 8-Core tower and rack models. It targets professional users who need maximum memory capacity for heavy workloads on Apple MacPro7,1 systems.

DDR4 2666 interface limits

The DDR4 2666 standard caps data-rate at 2666 MT/s and operates at 1.20V, so bandwidth and latency are fixed by the memory controller in the 3.5GHz Xeon W-3223 processor. Systems that require higher speeds or different voltages cannot use these modules.

64GB LRDIMM module density

Each 288-pin LRDIMM uses a 4Rx4 organisation to reach 64GB, a density only supported on Mac Pro 2019 8-Core configurations (A1991/EMC 3203 and A2304/EMC 3413). Builders needing lower-density RDIMMs or non-ECC memory must choose a different kit.

How it compares

Measured against everything we stock in Model-Specific Memory Upgrades, at today’s prices. Recalculated every night.

Price $1,219.99
Pricier than about 62% of the 21,161 comparable items (median $397.99).
Total capacity 384 GB (6 × 64 GB)
Higher than about 85% of the 20,941 comparable items (median 32 GB).
Price per GB $3.18 per GB
Cheaper than about 89% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameA-Tech
Product lineA-Tech DDR4 Apple Mac RAM Memory Upgrades
Total capacity384 GB (6 × 64 GB)
Performance
Rated speedDDR4 2666 (PC4 21300)
Processor
ChipsetMajor Brand Chipset
Memory
ECC supportYes
Buffer typeLoad Reduced
Power
Rated voltage1.2 V
Compatibility
Compatible systemsApple Mac Systems

Questions about this item

Should I choose the 384GB kit with six 64GB modules or a smaller capacity for my Mac Pro 2019?

The 384GB kit fills all six slots with 64GB LRDIMMs, matching the 8-Core Mac Pro's maximum supported configuration for large workloads.

What does the DDR4 2666 speed deliver once installed in the Mac Pro?

The modules run at 2666 MHz (PC4-21300) with 1.20V, providing the rated bandwidth the Xeon W-3223 memory controller expects.

How does the ECC LRDIMM 288-pin interface affect compatibility and performance limits?

Load-Reduced ECC LRDIMMs reduce electrical load on the memory bus, allowing the six-module population at 2666 MHz while maintaining error correction.

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