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Six silver DDR4 RDIMM modules with black chips on a light surface

A-Tech

A-Tech 48GB Kit (6x8GB) DDR4 2666 ECC RDIMM 288-Pin Memory Upgrade for Apple Mac Pro 2019 8-Core

SKU CH-14HZ-Z3GJM

A 48 GB DDR4 2666 ECC registered kit of six 8 GB modules built for the 2019 Mac Pro 8-core Xeon W-3223

  • Total capacity48 GB (6 × 8 GB)
  • Rated speedDDR4 2666 (PC4 21300)
  • ChipsetMajor Brand Chipset
  • Rated voltage1.2 V
  • Buffer typeRegistered
  • Compatible systemsApple Mac Systems
  • 48 GB capacity across six modules handles heavy multitasking
  • DDR4 2666 MHz speed keeps data moving quickly
  • ECC registered design protects against data errors
  • 20 V operation reduces power draw and heat
  • Certified for Apple Mac Pro 2019 8‑Core systems

48GB ECC Registered DDR4 Kit for Mac Pro 2019

This 48GB kit contains six 8GB DDR4 2666 RDIMM modules built for the Apple Mac Pro 2019 8-Core tower and rack models. It uses ECC registered technology with major-brand chips to meet the workstation's memory requirements. The modules run at 1.20V and are validated for the MacPro7,1 system identifier. Buyers needing capacity beyond 48GB or non-ECC memory for other platforms cannot use this kit.

Sustained Workload Stability

ECC registered operation corrects single-bit errors and reduces electrical load on the memory controller during long rendering, virtualization or compute sessions. The 2666MHz speed and 1Rx8 organisation maintain consistent throughput without the timing drift seen in unbuffered modules under continuous load. Registered buffering keeps signal integrity stable across all six slots populated. Systems that require unbuffered memory or consumer-grade speeds will not benefit from this design.

Six-Module Installation in Mac Pro Memory Slots

The 288-pin RDIMM form factor matches the Mac Pro 2019 DIMM slots exactly, and the 8-Core model provides six channels for this full kit. Modules must be installed in the prescribed slot order shown in the Apple service guide; skipping a slot or mixing capacities prevents boot. No firmware update or manual voltage adjustment is required beyond the standard 1.20V JEDEC setting. Builders using earlier Mac Pro models or third-party workstations will find the pinout and registration incompatible.

How it compares

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

Price $306.99
Typical for this category: the median of 21,161 items is $397.99.
Total capacity 48 GB (6 × 8 GB)
Higher than about 55% of the 20,941 comparable items (median 32 GB).
Price per GB $6.40 per GB
Cheaper than about 62% of the 20,941 comparable items (median $8.19 per GB).

New to this? Buying memory and SSDs with crypto — what to check, what it costs to pay, and what is never asked for.

Specifications

Product
Brand nameA-Tech
Product lineA-Tech DDR4 Apple Mac RAM Memory Upgrades
Total capacity48 GB (6 × 8 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 much power do the 1.20 V DDR4 2666 RDIMMs draw when the Mac Pro 2019 runs all day?

Each module runs at 1.20 V, the standard DDR4 voltage, so total draw stays within the Mac Pro's thermal design for six 8 GB RDIMMs.

Does the Mac Pro 2019 8-Core with the 3.5 GHz Xeon W-3223 need any firmware update before installing this 48 GB kit?

The kit is validated for MacPro7,1 (A2304 / A1991) and the listed Xeon W-3223; no extra firmware step is required beyond the current macOS.

Will these ECC registered 288-pin modules work alongside any original 2666 MHz sticks already in the 8-Core Mac Pro?

Yes, they match the factory DDR4 2666/2667 MHz ECC RDIMM spec, so mixed populations run at the same speed and timings.

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