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Four green DDR4 RDIMM modules with gold contacts and black chips

A-Tech

A-Tech 64GB Kit (4x16GB) DDR4 2666 ECC RDIMM for Mac Pro 2019 8-Core memory upgrade

SKU CH-C5Z4-REMBR

64 GB DDR4 2666 ECC registered RDIMM kit for 2019 Mac Pro 8-core upgrades

  • Total capacity64 GB (4 × 16 GB)
  • Rated speedDDR4 2666 (PC4 21300)
  • ChipsetMajor Brand Chipset
  • Rated voltage1.2 V
  • Buffer typeRegistered
  • Compatible systemsApple Mac Systems
  • 64GB total capacity from four 16GB modules
  • DDR4 2666 speed rated at PC4-21300
  • ECC registered design protects data integrity
  • Built for Mac Pro 2019 8-core systems
  • 288-pin RDIMM form factor fits approved slots

Mac Pro 2019 8-Core memory upgrade

This 64GB kit contains four 16GB DDR4 2666 ECC registered DIMMs built for the Apple Mac Pro 2019 8-Core tower and rack models. It matches the MacPro7,1 identifier and order numbers A2304 and A1991. The modules run at 1.20V and use major-brand chips validated for Apple systems.

288-pin RDIMM installation

Each module fits a standard 288-pin DDR4 slot and seats with the same force as any registered DIMM. The Mac Pro 2019 8-Core requires memory to be installed in matched sets of four for full bandwidth; mixing capacities or leaving a slot empty will reduce performance. No tools beyond the case latch are needed.

Sustained workload stability

ECC registered operation detects and corrects single-bit errors during long render, compile or virtualization sessions, preventing silent data corruption. The 2666/2667 MHz rating and 1.20V voltage are maintained under continuous load without thermal throttling on the supported Xeon W-3223 processor.

How it compares

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

Price $599.99
Typical for this category: the median of 21,161 items is $397.99.
Total capacity 64 GB (4 × 16 GB)
Higher than about 60% of the 20,941 comparable items (median 32 GB).
Price per GB $9.37 per GB
Typical for this category: the median of 20,941 items is $8.19 per GB.

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Specifications

Product
Brand nameA-Tech
Product lineA-Tech DDR4 Apple Mac RAM Memory Upgrades
Total capacity64 GB (4 × 16 GB)
Performance
Rated speedDDR4 2666 (PC4 21300)
Processor
ChipsetMajor Brand Chipset
Memory
ECC supportYes
Buffer typeRegistered
Power
Rated voltage1.2 V
Compatibility
Compatible systemsApple Mac Systems

Questions about this item

How can I verify the 64GB kit is running at 2666 MHz with ECC registered operation after installing it in my Mac Pro 2019?

Open System Report in macOS and confirm the memory section shows four 16GB modules at 2666 MHz, DDR4 ECC RDIMM, 288-pin, 1.20V. The total should read 64GB.

What comes in the box with the 64GB kit and is anything else required for installation in a Mac Pro 2019?

The box contains four 16GB DDR4 2666 ECC RDIMM modules. No additional parts or tools are needed; the modules install directly into the Mac Pro 2019 memory slots.

Which capacity version should I choose for a Mac Pro 2019 8-Core with Xeon W-3223 if I want 64GB total?

This 64GB kit (4 x 16GB) is the correct version for 64GB total capacity on the Mac Pro 2019 8-Core with the 3.5GHz Xeon W-3223.

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