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Four green DDR4 RDIMM modules with black heat spreaders and gold contacts

A-Tech

A-Tech 256GB (4x64GB) DDR4 2933 ECC RDIMM for Mac Pro 2019

SKU CH-FSXS-QFQ7Q

A 256 GB DDR4 2933 ECC registered kit of four 64 GB modules for 2019 Mac Pro tower and rack models

  • Total capacity256 GB (4 × 64 GB)
  • Rated speedDDR4 2933 (PC4 23400)
  • ChipsetMajor Brand Chipset
  • Rated voltage1.2 V
  • Buffer typeRegistered
  • Compatible systemsApple Mac Systems
  • 256 GB capacity across four 64 GB modules enables heavy multitasking
  • DDR4 2933 MHz speed with PC4-23400 rating accelerates data throughput
  • ECC registered design detects and corrects memory errors automatically
  • Validated for Mac Pro 2019 models with 12, 16, 24 and 28-core Xeon CPUs
  • Low 1.20 V operation reduces power draw and heat output

256GB DDR4 2933 ECC RDIMM Kit

This 256GB kit contains four 64GB DDR4 2933MHz registered ECC modules built for the 2019 Mac Pro tower and rack models. It supports the 12, 16, 24 and 28-core Xeon W configurations listed by Apple. The modules run at 1.20V and use major-brand chips on a 288-pin RDIMM form factor.

Sustained Workload Behaviour

Registered ECC circuitry adds a clock cycle per command but corrects single-bit errors on the fly, keeping data integrity intact during long renders or large dataset processing. The 2Rx4 organisation spreads accesses across ranks, helping the memory controller maintain throughput when all twelve or more CPU cores are active for hours.

DDR4 2933 Interface Limits

The PC4-23400 rating caps peak bandwidth at the JEDEC DDR4-2933 specification, so workloads that scale beyond this transfer rate will not gain from faster modules. Four slots are populated by this kit; expanding further requires removing modules because the Mac Pro 2019 memory architecture does not expose additional DIMM sockets.

How it compares

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

Price $1,342.99
Pricier than about 63% of the 21,161 comparable items (median $397.99).
Total capacity 256 GB (4 × 64 GB)
Higher than about 80% of the 20,941 comparable items (median 32 GB).
Price per GB $5.25 per GB
Cheaper than about 73% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameA-Tech
Product lineA-Tech DDR4 Apple Mac RAM Memory Upgrades
Total capacity256 GB (4 × 64 GB)
Performance
Rated speedDDR4 2933 (PC4 23400)
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 does the 1.20 V DDR4 2933 RDIMM kit draw under sustained load in a 2019 Mac Pro?

Each module runs at 1.20 V; the four 64 GB sticks together draw only the standard DDR4 registered DIMM power envelope for this platform.

What must the Mac Pro already have for these four 288-pin RDIMMs to be recognised?

A Mac Pro 7,1 (2019 tower or rack) with 12, 16, 24 or 28-core Xeon W processor and macOS supporting 256 GB memory.

Will the ECC registered 2933 MHz kit run stably with the Xeon W-3275M, W-3265M, W-3245 or W-3235 CPUs?

Yes — the kit is validated for those exact 2.5 GHz, 2.7 GHz, 3.2 GHz and 3.3 GHz Xeon W processors in the 2019 Mac Pro.

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