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Two green DDR4 laptop memory sticks with gold contacts

Timetec

Timetec MR-H16D426S7E 32GB (2x16GB) DDR4 2666 laptop RAM

SKU CH-V8CF-WA0KN

A 32 GB dual-channel DDR4 2666 SO-DIMM kit for compatible 27-inch iMac and late 2018 Mac mini models

  • Total capacity32 GB (2 × 16 GB)
  • Rated speedDDR4 2666 (PC4 21300)
  • CAS latencyCL19
  • Rated voltage1.2 V
  • Buffer typeUnbuffered
  • Product type260-Pin DDR4 SO-DIMM

Capacity 32GB (2 x 16GB)

  • 32 GB dual-channel kit expands memory capacity for demanding workloads
  • DDR4 2666 speed with CL19 latency delivers responsive data access
  • 2 V low-voltage operation reduces power draw and heat
  • 260-pin SO-DIMM form factor fits Mid 2020 27-inch iMac, Mid 2019 27-inch iMac and Late 2018 Mac mini
  • Two 16 GB modules tested for voltage, temperature and signal integrity stability

Compatible Mac Memory Upgrade

This 32 GB kit contains two 16 GB DDR4 2666 SO-DIMM modules built for the 27-inch iMac models from 2019 and 2020 as well as the Late 2018 Mac mini. It targets owners of those specific Apple desktops who need more memory for multitasking or data-heavy workloads. The kit is not suited for laptops or PCs that require different pin counts, voltages or DDR generations. Buyers with newer Apple silicon machines cannot use this memory at all.

Thermals and Power Efficiency

Each module runs at 1.20 V, the standard low voltage for DDR4 SO-DIMM, which keeps heat output modest inside the tight iMac or Mac mini enclosures. Unbuffered, non-ECC operation avoids the extra power draw of registered designs. No active cooling is present on the sticks, so they rely on the system’s existing airflow. Under normal workloads the memory stays within the thermal envelope Apple designed for these slots.

Verified Stability Testing

Every module undergoes component-level validation for voltage tolerance, temperature resistance, signal integrity and macOS software compatibility before shipping. This testing regime aims to eliminate compatibility errors and kernel panics after installation. The kit includes only the two memory sticks; no tools, brackets or software utilities are bundled. Users simply insert the modules into the available slots to gain the extra capacity.

How it compares

Measured against everything we stock in Laptop RAM, at today’s prices. Recalculated every night.

Price $153.99
Pricier than about 71% of the 2,079 comparable items (median $70.99).
Total capacity 32 GB (2 × 16 GB)
Higher than about 80% of the 1,886 comparable items (median 16 GB).
Price per GB $4.81 per GB
Cheaper than about 69% of the 1,886 comparable items (median $5.94 per GB).

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Specifications

Product
Brand nameTimetec
Model nameMR-H16D426S7E
Total capacity32 GB (2 × 16 GB)
Product type260-Pin DDR4 SO-DIMM
Performance
Rated speedDDR4 2666 (PC4 21300)
Memory
CAS latencyCL19
ECC supportNo
Buffer typeUnbuffered
Power
Rated voltage1.2 V

Other versions of this model

5 more in the same range

Questions about this item

How do I install the 260-pin DDR4 SO-DIMM modules into the iMac 20,1 memory slots, and what step is often missed?

Power off and unplug the iMac 20,1, lay it face-down on a soft cloth, press the memory compartment door button to open it, eject the levers outward, align each module notch with the slot key, press firmly until the levers click back, then close the door before reconnecting power.

What maintenance or replacement will the 1.20V unbuffered non-ECC DDR4 kit need later?

No scheduled maintenance is required; the modules are solid-state with no moving parts. Replace only if a memory diagnostic reports errors or if you upgrade capacity beyond the 32 GB (2 x 16 GB) kit.

What limit appears first under sustained load with the CL19 2666 MHz DDR4 memory?

The CAS latency of CL19 at 2666 MHz sets the access timing floor; under sustained workloads the memory controller will hit this latency ceiling before bandwidth or voltage limits become binding.

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