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Green circuit board SODIMM module with black memory chips, no heat spreader

NEMIX RAM

NEMIX RAM 16GB DDR4 2666MHz CL19 2Rx8 1.2V 260-pin SODIMM for Apple iMac 21.5" 2020

SKU CH-MRVY-6P4BP

16 GB DDR4 2666 MHz CL19 SODIMM module built for the 21.5 inch 2020 iMac

  • Capacity16GB
  • SpeedDDR4 2666 (PC4 21300)
  • ECCNo
  • Buffered/RegisteredUnbuffered
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • Voltage1.20V
  • 16GB DDR4 2666MHz boosts iMac 21.5" 2020 responsiveness
  • CL19 2Rx8 1.2V operation keeps power draw low
  • 260-pin SODIMM form factor fits Apple mid-2020 slot exactly
  • Samsung Micron Hynix chips deliver tested stability under load
  • Non-ECC unbuffered design matches original iMac memory specification

Compatibility Focus

This 260-pin DDR4 SODIMM is built for the Apple 21.5-inch iMac with Retina 4K display released in 2020. It targets owners of that specific all-in-one desktop who need to expand system memory beyond the factory configuration.

Single Module Impact

The package delivers one 16 GB stick rated at 2666 MHz with CL19 latency and 1.2 V operation. Adding this module increases total capacity directly, allowing the iMac to handle larger workloads and more simultaneous applications without relying on slower storage swapping.

Build and Connector Reality

Chips come from major OEM sources such as Samsung, Micron or Hynix and carry no heat spreader, keeping the profile slim for the tight SODIMM slot. The 2Rx8 rank organisation and unbuffered non-ECC design match the iMac’s memory controller requirements for stable daily operation.

Points forts

  • 16GB DDR4 2666MHz boosts iMac 21.5" 2020 responsiveness
  • CL19 2Rx8 1.2V operation keeps power draw low
  • 260-pin SODIMM form factor fits Apple mid-2020 slot exactly
  • Samsung Micron Hynix chips deliver tested stability under load
  • Non-ECC unbuffered design matches original iMac memory specification

Caractéristiques

BrandNEMIX RAM
SeriesApple iMac/Mac Mini Compatible Series Memory
ModelApple DDR4 2666MHZ Non-ECC Unbuffered SODIMM
Part NumberMS21300-628K1
Capacity16GB
SpeedDDR4 2666 (PC4 21300)
ECCNo
Buffered/RegisteredUnbuffered
ChipsetMajor OEM Samsung, Micron, Hynix
Voltage1.20V
Compatible SystemApple
CAS LatencyCL19
Heat SpreaderNo
Type260-Pin DDR4 SODIMM
Rank2Rx8
FeaturesDDR4 Non-ECC Unbuffered SODIMM Motherboard Compatible
Package Content16GB (1X16GB) DDR4 2666MHZ PC4-21300 2Rx8 1.2V CL19 260-PIN Non-ECC Unbuffered SODIMM

Questions sur cet article

Will the 2Rx8 DDR4 SODIMM need any firmware updates or periodic reseating after installation?

No firmware updates are required for this DDR4 2666 CL19 module, and the 260-pin SODIMM stays firmly seated once installed in the 21.5" 2020 iMac.

What is the first limit reached when the 16 GB module runs at full 2666 MHz speed continuously?

The CAS latency of CL19 at 1.20 V sets the timing ceiling, so sustained throughput is bounded by those fixed latency cycles.

How much heat and fan noise does the 1.2 V 2Rx8 stick add during all-day workloads?

The module runs at standard 1.2 V without a heat spreader, so it adds minimal thermal load and no audible noise inside the iMac chassis.

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