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Two green 288-pin DDR4 LRDIMM modules with black chips and gold contacts

A-Tech

A-Tech 64GB Kit (2x32GB) DDR4 2666 ECC LRDIMM Mac Pro 2019 memory upgrade

SKU CH-7V4W-G9MNJ

A 64 GB kit of two 32 GB DDR4 2666 ECC LRDIMM modules for Apple Mac Pro 2019 systems

  • Capacity64GB (2 x 32GB)
  • SpeedDDR4 2666 (PC4 21300)
  • Voltage1.20V
  • ECCYes
  • Buffered/RegisteredLoad Reduced
  • ChipsetMajor Brand Chipset
  • 64GB total capacity with two 32GB modules
  • DDR4 2666 speed rated at PC4-21300
  • ECC Load Reduced technology for error correction
  • Designed for Apple Mac Pro 2019 tower and rack
  • 288-pin LRDIMM form factor at 1.20V

Mac Pro 2019 memory kit

This 64GB kit contains two 32GB DDR4 2666 LRDIMM modules built for the Apple Mac Pro 2019 tower and rack models. It targets users who need ECC load-reduced memory for intensive workloads on MacPro7,1 systems.

DDR4 2666 LRDIMM constraints

The Mac Pro 2019 accepts only DDR4 2666 or 2667MHz PC4-21300 ECC LRDIMM modules in a 288-pin form factor. Standard UDIMM or RDIMM types will not function, and speeds above 2667MHz are not supported by the platform.

2Rx4 rank configuration decides fit

Each 32GB module uses a 2Rx4 organisation that the Mac Pro 2019 memory controller requires. Kits with different rank structures or non-load-reduced ECC will not be recognised, making this specification the single compatibility gate.

Highlights

  • 64GB total capacity with two 32GB modules
  • DDR4 2666 speed rated at PC4-21300
  • ECC Load Reduced technology for error correction
  • Designed for Apple Mac Pro 2019 tower and rack
  • 288-pin LRDIMM form factor at 1.20V

Specifications

BrandA-Tech
SeriesA-Tech DDR4 Apple Mac RAM Memory Upgrades
Capacity64GB (2 x 32GB)
SpeedDDR4 2666 (PC4 21300)
Voltage1.20V
ECCYes
Buffered/RegisteredLoad Reduced
ChipsetMajor Brand Chipset
Compatible SystemApple Mac Systems
FeaturesMajor Brand Chips

Questions about this item

Should I choose the 64GB kit or a different capacity for my Mac Pro 2019?

This kit provides 64GB total as two 32GB LRDIMM modules. The Mac Pro 2019 uses the MacPro7,1 platform and accepts DDR4 2666 ECC LRDIMM memory in 288-pin form factor.

What does the 2666 MHz rating mean once the memory is installed in the Mac Pro 2019?

The modules run at DDR4 2666 (PC4-21300) with a CAS latency appropriate for ECC LRDIMM operation. The system clocks them at 2666 MHz, matching the 3.5GHz Xeon W-3223 memory controller specification.

How does the DDR4 2666 ECC LRDIMM interface limit performance in this machine?

The 288-pin LRDIMM form factor with load-reduced buffering and ECC is required by the Mac Pro 2019 memory architecture. Speed is capped at DDR4 2666 (PC4-21300) by the Xeon W-3223 integrated memory controller.

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