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Four green DDR4 RDIMM modules with black chips, no heat spreaders

A-Tech

A-Tech 32GB (4x8GB) DDR4 2666MHz ECC RDIMM for iMac Pro (Late 2017) memory upgrade

SKU CH-84FG-6F9QX

A 32 GB DDR4 2666 MHz ECC registered kit of four 8 GB modules built for the iMac Pro (Late 2017)

  • Capacity32GB (4 x 8GB)
  • SpeedDDR4 2666 (PC4 21300)
  • Voltage1.20V
  • ECCYes
  • Buffered/RegisteredRegistered
  • Rank1Rx8
  • 32 GB capacity handles heavy workloads with four 8 GB modules
  • DDR4 2666 MHz speed matches iMac Pro Late 2017 spec
  • ECC registered design protects data integrity for professional use
  • 288-pin RDIMM form factor fits Apple iMac Pro A1862 exactly
  • 20 V low voltage reduces power draw and heat output

iMac Pro (Late 2017) 32GB ECC RDIMM Kit

This 32GB kit contains four 8GB DDR4 2666MHz registered ECC modules built for the iMac Pro (Late 2017). It matches the factory PC4-21300 specification and uses major-brand chips on a 288-pin RDIMM form factor. The memory runs at 1.20V and is configured as 1Rx8 for stable server-grade operation.

Suits owners of A1862 EMC 3144 systems.

The kit targets the iMacPro1,1 model (order number MQ2Y2LL/A) that requires registered ECC RDIMMs. Buyers with standard consumer Macs or laptops that accept only unbuffered non-ECC SODIMMs cannot use these modules. The 288-pin DIMM form factor also prevents installation in any SODIMM-only platform.

Registered ECC RDIMM is the decisive spec

The iMac Pro (Late 2017) memory controller demands registered ECC DDR4 RDIMMs; unbuffered or non-ECC alternatives will not function. This kit delivers exactly that 288-pin registered ECC design at the correct 2666MHz speed and 1.20V voltage. Verifying the registered ECC requirement against your system documentation is the single step that confirms compatibility.

Highlights

  • 32 GB capacity handles heavy workloads with four 8 GB modules
  • DDR4 2666 MHz speed matches iMac Pro Late 2017 spec
  • ECC registered design protects data integrity for professional use
  • 288-pin RDIMM form factor fits Apple iMac Pro A1862 exactly
  • 20 V low voltage reduces power draw and heat output

Specifications

BrandA-Tech
SeriesA-Tech DDR4 Apple Mac RAM Memory Upgrades
Capacity32GB (4 x 8GB)
SpeedDDR4 2666 (PC4 21300)
Voltage1.20V
ECCYes
Buffered/RegisteredRegistered
Rank1Rx8
ChipsetMajor Brand Chipset
Heat SpreaderNo
Compatible SystemApple Mac Systems
FeaturesMajor Brand Chips

Questions about this item

Does the 32GB kit contain four 8GB modules or do I need to buy them separately?

The kit ships as four 8GB RDIMM modules totalling 32GB; nothing else is required for the upgrade.

Should I choose the 2666MHz or 2667MHz rating for my Late 2017 iMac Pro?

Both ratings refer to the same PC4-21300 specification; the iMac Pro (Late 2017) runs the memory at 2666MHz.

What does the 2666MHz speed mean once the RDIMM is installed in the iMac Pro?

The modules operate at DDR4 2666MHz with ECC registered buffering, matching the iMac Pro's native memory controller.

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