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Mushkin Enhanced

Mushkin Enhanced MAR3S186DM8G28X2 16GB (2 x 8GB) DDR3L 1866 SO-DIMM memory upgrade

SKU CH-EMWP-QJ8JN MPN MAR3S186DM8G28X2

16 GB dual-channel DDR3L 1866 SO-DIMM kit for late-2015 27-inch iMac Core i5/i7 models

  • Total capacity16 GB (2 × 8 GB)
  • Rated speedDDR3L 1866 (PC3L 14900)
  • CAS latency13
  • Memory timings13-13-13-32
  • Rated voltage1.35 V
  • Kit configurationDual Channel kit
  • 16 GB dual-channel kit boosts multitasking headroom
  • DDR3L 1866 speed with CL13 timing cuts latency
  • 35 V low-voltage operation reduces heat
  • 204-pin SO-DIMM fits Late-2015 27-inch iMac
  • Engineered and tested in the USA since 1994

Targeted Mac Upgrade

This 16 GB kit uses two 8 GB DDR3L 1866 SO-DIMM modules built for the 27-inch Late 2015 iMac with Core i5 or i7 processors. It plugs directly into the 204-pin slots without any configuration changes.

Low-Profile Reliability

Modules run at 1.35 V with 13-13-13-32 timings and carry no heat spreader, so they fit the slim SO-DIMM sockets inside the all-in-one chassis. Dual-channel packaging keeps bandwidth balanced for everyday workloads.

From Factory 8 GB to 16 GB

The kit doubles the common 8 GB factory configuration, giving headroom for heavier multitasking and larger project files. Users already running 16 GB or more will not see a benefit from this specific upgrade.

How it compares

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

Price $47.99
Cheaper than about 78% of the 21,161 comparable items (median $397.99).
Total capacity 16 GB (2 × 8 GB)
Lower than about 70% of the 20,941 comparable items (median 32 GB).
CAS latency 13
Lower than about 86% of the 483 comparable items (median 22).
Price per GB $3.00 per GB
Cheaper than about 90% of the 20,941 comparable items (median $8.19 per GB).

New to this? Buying memory and SSDs with crypto — what to check, what it costs to pay, and what is never asked for.

Specifications

Product
Brand nameMushkin Enhanced
Product lineiRam
Model nameMAR3S186DM8G28 × 2
Total capacity16 GB (2 × 8 GB)
Product type204-Pin DDR3 SO-DIMM
Performance
Rated speedDDR3L 1866 (PC3L 14900)
Memory
CAS latency13
Memory timings13-13-13-32
Kit configurationDual Channel kit
Heat spreaderNo
Power
Rated voltage1.35 V
Size & build
Shipping weight0.11 kg
Package size163 × 135 × 15 mm
Compatibility
Compatible withiMac "Core i5/i7 in 27 in (Late 2015)

Questions about this item

Does the DDR3L 1866 (PC3L 14900) interface cap real-world bandwidth below the rated speed?

The kit runs at DDR3L 1866 with CL13 13-13-13-32 timings; actual throughput depends on the iMac memory controller and workload.

Will the 204-pin SO-DIMM modules fit the Late-2015 27-inch iMac memory slots?

Yes, the 204-pin DDR3L SO-DIMM form factor matches the two user-accessible slots in the 27-inch Late-2015 iMac.

How are the modules installed, and what step do people often miss?

Power off, unplug, lay the iMac screen-down on a soft cloth, remove the memory door, eject existing modules by spreading the clips, insert each 8 GB stick until the clips click, then replace the door before powering on.

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