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Green circuit board with black memory chips, 260-pin SODIMM form factor, no heat spreader

NEMIX RAM

NEMIX RAM 32GB DDR4 2666 CL19 2Rx8 1.2V 260-Pin SODIMM memory upgrade

SKU CH-WE4H-DNY99

32 GB DDR4 2666 CL19 SODIMM module for compatible Apple iMac and Mac Mini systems

  • Total capacity32 GB
  • Rated speedDDR4 2666 (PC4 21300)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL19
  • Buffer typeUnbuffered
  • Rated voltage1.2 V
  • 32GB single module doubles capacity on supported Macs
  • DDR4 2666 speed matches Apple factory specification
  • CL19 latency keeps timing within system requirements
  • 2V operation runs cool without extra power draw
  • 260-pin SODIMM form factor fits iMac and Mac Mini slots

Apple iMac and Mac Mini upgrade

This 32 GB DDR4 SODIMM is built for Apple iMac and Mac Mini systems that accept 2666 MHz PC4-21300 memory. The single 260-pin module delivers 32 GB in one slot, using 2Rx8 organisation and CL19 timing. It targets owners who want a straightforward capacity increase without changing voltage or form factor.

Thermals and power in daily use

Operating at 1.20 V, the unbuffered non-ECC design draws only standard DDR4 SODIMM power during typical desktop workloads. With no heat spreader fitted, the module relies on the system's existing airflow, which is sufficient for normal office and creative tasks. Acoustic impact is negligible because the memory adds no moving parts.

Sustained load behaviour

Under prolonged heavy use the chips maintain their rated 2666 MHz speed and CL19 latency without throttling. The 2Rx8 layout provides two ranks per channel for efficient interleaving during long render or compile sessions. Stability is validated by stress testing at the specified voltage, so extended workloads stay reliable within the thermal envelope of the host computer.

How it compares

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

Price $224.99
Cheaper than about 57% of the 21,161 comparable items (median $397.99).
Total capacity 32 GB
Typical for this category: the median of 20,941 items is 32 GB.
Price per GB $7.03 per GB
Cheaper than about 57% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameNEMIX RAM
Product lineApple iMac/Mac Mini Compatible Series Memory
Model nameApple DDR4 2666 MHz Non-ECC Unbuffered SODIMM
Part numberMS21300-328K1
Total capacity32 GB
Product type260-Pin DDR4 SODIMM
Performance
Rated speedDDR4 2666 (PC4 21300)
Processor
ChipsetMajor OEM Samsung, Micron, Hynix
Memory
CAS latencyCL19
ECC supportNo
Buffer typeUnbuffered
Heat spreaderNo
Memory rank2Rx8
Power
Rated voltage1.2 V
Compatibility
Compatible systemsApple
In the box
Included items32 GB (1 × 32 GB) DDR4 2666 MHz PC4-21300 2Rx8 1.2 V CL19 260-PIN Non-ECC Unbuffered SODIMM

Questions about this item

How do I install this 260-pin SODIMM in my iMac, and what step do people often miss?

Insert the module at an angle until the gold contacts are fully seated, then press down firmly until the side clips click — the step many skip is verifying both clips have locked.

What maintenance or replacement will this 32GB DDR4 module need later?

No routine maintenance is required; the module is solid-state and rated for 1.2 V operation, so replacement only occurs if a fault develops or capacity needs increase.

What limit appears first under sustained heavy workloads with this CL19 2Rx8 kit?

The CAS latency of 19 cycles at 2666 MT/s sets the baseline access delay, which becomes the bottleneck before thermal or voltage limits are reached.

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