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Eight silver DDR4 RDIMM sticks with black chips and gold contacts

A-Tech

A-Tech 256GB Kit (8x32GB) DDR4 2666 ECC RDIMM Memory Upgrade for Mac Pro (2019)

SKU CH-JF3H-3RMTB

Eight 32 GB DDR4 2666 ECC registered RDIMMs totalling 256 GB for the 2019 Mac Pro

  • Capacity256GB (8 x 32GB)
  • SpeedDDR4 2666 (PC4 21300)
  • Voltage1.20V
  • ECCYes
  • Buffered/RegisteredRegistered
  • ChipsetMajor Brand Chipset
  • 256GB total capacity from eight 32GB modules
  • DDR4 2666 speed with PC4-21300 bandwidth rating
  • ECC registered design detects and corrects data errors
  • 288-pin RDIMM form factor fits Mac Pro (2019) slots
  • Validated for MacPro7,1 and A2304/A1991 model identifiers

256GB DDR4 2666 ECC RDIMM Kit

This kit provides 256GB of DDR4 2666 memory across eight 32GB registered DIMMs. It is built for the 2019 Mac Pro tower and rack models using the MacPro7,1 identifier. The modules run at 1.20V and carry ECC registered functionality for error correction. Professionals expanding memory on these specific workstations will find the capacity and form factor match the factory slots.

Eight-Module Population

Supplying eight 32GB sticks fills all available DIMM slots in the supported Mac Pro configurations. This removes the need to mix module sizes or leave slots empty, letting the memory controller operate in its optimal channel arrangement. The 2Rx4 rank organisation and PC4-21300 rating are factory-matched to the 3.5GHz Xeon W-3223 processor used in the 8-core model.

Registered 288-Pin Build

Each module uses a 288-pin RDIMM form factor with major-brand chips, ensuring mechanical compatibility with the Mac Pro memory tray. Registered buffering reduces electrical load on the memory bus when all eight slots are populated. The kit carries Apple model IDs A1991 and A2304 along with EMC numbers 3203 and 3413 for direct cross-reference. Systems requiring unbuffered UDIMMs or non-ECC memory cannot use this kit.

Punti di forza

  • 256GB total capacity from eight 32GB modules
  • DDR4 2666 speed with PC4-21300 bandwidth rating
  • ECC registered design detects and corrects data errors
  • 288-pin RDIMM form factor fits Mac Pro (2019) slots
  • Validated for MacPro7,1 and A2304/A1991 model identifiers

Caratteristiche tecniche

BrandA-Tech
SeriesA-Tech DDR4 Apple Mac RAM Memory Upgrades
Capacity256GB (8 x 32GB)
SpeedDDR4 2666 (PC4 21300)
Voltage1.20V
ECCYes
Buffered/RegisteredRegistered
ChipsetMajor Brand Chipset
Compatible SystemApple Mac Systems
FeaturesMajor Brand Chips

Domande su questo articolo

Will the 288-pin RDIMM modules need any firmware updates or periodic reseating after installation?

No firmware updates or scheduled reseating are required; the DDR4 2666 ECC registered modules are validated for the Mac Pro 7,1 and run at 1.20 V for the life of the system.

What is the first limit reached when all eight 32 GB modules run at 2666 MHz under continuous heavy workloads?

The memory controller on the 3.5 GHz Xeon W-3223 caps the kit at 2666 MHz, so sustained throughput cannot exceed the PC4-21300 rating.

How much extra heat and fan noise does the 256 GB kit add when the Mac Pro runs all day?

Each module operates at the standard 1.20 V DDR4 voltage, so thermal output and acoustic profile remain within the Mac Pro's original cooling design.

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