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Twelve green DDR4 RDIMM modules with gold contacts and black heat spreaders, 384GB total

A-Tech

A-Tech 384GB (12x32GB) DDR4 2666 ECC RDIMM Mac Pro 2019 memory upgrade

SKU CH-JFZB-ZJD8P

384GB DDR4 2666 ECC RDIMM kit with twelve 32GB modules for Mac Pro 2019 towers and racks

  • Capacity384GB (12 x 32GB)
  • SpeedDDR4 2666 (PC4 21300)
  • Voltage1.20V
  • ECCYes
  • Buffered/RegisteredRegistered
  • ChipsetMajor Brand Chipset
  • 384GB capacity across 12 modules handles heavy workloads
  • DDR4 2666/2667MHz speed accelerates data throughput
  • ECC registered design protects data integrity
  • 288-pin RDIMM form factor fits Mac Pro 2019 slots
  • Tested for Apple Mac Pro 7,1 and A2304/A1991 models

384GB DDR4 ECC RDIMM Kit

This 384GB kit contains twelve 32GB DDR4 2666 registered ECC modules built for the Apple Mac Pro 2019. It targets professionals who need maximum memory capacity for large datasets, virtualisation or high‑resolution media work on this specific workstation platform.

Upgrade from lower‑capacity factory memory

The kit replaces the standard Apple‑supplied modules when the workload exceeds the original memory ceiling. The jump is worth it when projects regularly saturate the installed RAM and cause swapping, allowing the 3.5GHz Xeon W‑3223 to keep all working data in physical memory.

Sustained load behaviour with registered ECC

Registered buffering and ECC correction maintain data integrity during continuous, multi‑hour compute tasks. The 1.20V modules run at the rated 2666/2667MHz speed across all twelve slots, delivering stable throughput for rendering, scientific simulation or database workloads without the error accumulation seen in unbuffered configurations.

Highlights

  • 384GB capacity across 12 modules handles heavy workloads
  • DDR4 2666/2667MHz speed accelerates data throughput
  • ECC registered design protects data integrity
  • 288-pin RDIMM form factor fits Mac Pro 2019 slots
  • Tested for Apple Mac Pro 7,1 and A2304/A1991 models

Specifications

BrandA-Tech
SeriesA-Tech DDR4 Apple Mac RAM Memory Upgrades
Capacity384GB (12 x 32GB)
SpeedDDR4 2666 (PC4 21300)
Voltage1.20V
ECCYes
Buffered/RegisteredRegistered
ChipsetMajor Brand Chipset
Compatible SystemApple Mac Systems
FeaturesMajor Brand Chips

Questions about this item

Will the 288-pin RDIMM modules fit the Mac Pro 2019 memory slots?

Yes, the 12 modules are 288-pin DDR4 RDIMMs that match the Mac Pro 2019 (MacPro7,1) memory slots exactly.

Do I need to install the 12 modules in a specific order across the 12 DIMM slots?

Populate all 12 slots; the Mac Pro 2019 uses a 12-channel architecture and requires identical 32 GB modules in every slot for full bandwidth.

When should I consider replacing these ECC RDIMMs?

Replace a module only if macOS reports corrected or uncorrected ECC errors, or if the system fails the Apple Diagnostics memory test.

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