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Four green DDR4 RDIMM sticks in a clear tray

NEMIX RAM

NEMIX RAM 64GB (4x16GB) DDR4 2666MHz ECC RDIMM CL19 1.2V 288-pin Apple iMac Pro 2017-2021 memory upgrade

SKU CH-PTX1-S88FQ

A 64 GB kit of four 16 GB DDR4 2666 MHz ECC registered DIMMs built for Apple iMac Pro models from 2017 to 2021

  • Capacity64GB (4 x 16GB)
  • SpeedDDR4 2666 (PC4 21300)
  • ECCYes
  • Buffered/RegisteredRegistered
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • Voltage1.20V
  • 64 GB kit expands iMac Pro memory capacity
  • DDR4 2666 MHz speed matches original system specification
  • ECC registered design protects data integrity under load
  • 2 V operation keeps power draw low
  • Four 16 GB modules fill all slots for full upgrade

iMac Pro 2017-2021 memory kit

This 64GB kit contains four 16GB DDR4 2666MHz ECC RDIMM modules built for the Apple iMac Pro 2017-2021. It targets professionals who need registered, error-correcting memory to keep workstations stable under sustained loads. The modules run at 1.2V with CL19 latency and use a 288-pin form factor.

Installation and common issues

The DIMMs slot into the iMac Pro memory compartment after removing the access door; no tools are required beyond a soft cloth. Because the system expects registered ECC RDIMMs, mixing unbuffered or non-ECC sticks will prevent boot. Ensure all four slots are populated with identical 1Rx4 modules for full compatibility.

Registered ECC RDIMM requirement

The single specification that decides fit is the registered ECC RDIMM design with 1Rx4 organisation. Standard desktop UDIMMs or SO-DIMMs will not work in this workstation. Buyers who need non-ECC or unregistered memory for other Mac models should look elsewhere.

Points forts

  • 64 GB kit expands iMac Pro memory capacity
  • DDR4 2666 MHz speed matches original system specification
  • ECC registered design protects data integrity under load
  • 2 V operation keeps power draw low
  • Four 16 GB modules fill all slots for full upgrade

Caractéristiques

BrandNEMIX RAM
SeriesApple iMac/Mac Mini Compatible Series Memory
ModelApple DDR4 2666MHZ ECC RDIMM Registered Server Memory
Part NumberMR21300-614K4
Capacity64GB (4 x 16GB)
SpeedDDR4 2666 (PC4 21300)
ECCYes
Buffered/RegisteredRegistered
ChipsetMajor OEM Samsung, Micron, Hynix
Voltage1.20V
Compatible SystemApple
CAS LatencyCL19
Heat SpreaderNo
Type288-Pin DDR4 RDIMM
Rank1Rx4
FeaturesDDR4 ECC Registered RDIMM Server Motherboard Compatible
Package Content64GB (4X16GB) DDR4 2666MHZ PC4-21300 1Rx4 1.2V CL19 288-PIN ECC RDIMM Registered Server Memory KIT

Questions sur cet article

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

Open System Report in macOS and confirm each 16GB module shows DDR4 2666, ECC enabled, and registered type under the Memory section.

What modules are included and is any extra hardware needed for the upgrade?

The box contains four 16GB DDR4 2666MHz ECC RDIMM sticks; no additional brackets, tools or cables are required for the iMac Pro memory slots.

Which capacity kit should I choose if I want the maximum supported 64GB for iMac Pro 2017-2021?

This 64GB kit (4x16GB) fills all four slots and matches the highest factory-supported capacity for those models.

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