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Mushkin Enhanced

Mushkin Enhanced iRam 8GB (2 x 4GB) DDR3L 1866 SO-DIMM memory upgrade MAR3S186DM4G18X2

SKU CH-RPWE-3WA66 MPN MAR3S186DM4G18X2

Dual-channel 8 GB DDR3L 1866 SO-DIMM kit validated for late-2015 27-inch iMac Core i5/i7 models

  • Total capacity8 GB (2 × 4 GB)
  • Rated speedDDR3L 1866 (PC3L 14900)
  • CAS latency13
  • Memory timings13-13-13-32
  • Rated voltage1.35 V
  • Kit configurationDual Channel kit
  • 8GB dual-channel kit expands late-2015 iMac memory capacity
  • DDR3L 1866 speed with CL13 timing delivers responsive system performance
  • 35V low-voltage operation reduces power draw and heat
  • 204-pin SO-DIMM form factor fits 27-inch Core i5/i7 iMac slots
  • Engineered in the U.S.A. since 1994 for reliable quality

iMac Late 2015 memory kit

This dual-channel kit supplies two 204-pin SO-DIMM modules rated at DDR3L 1866 with CL13 timing and 1.35 V operation. The 8 GB total capacity is targeted at the 27-inch iMac models released in late 2015 that accept DDR3L memory. Mushkin Enhanced validates compatibility for the Core i5 and Core i7 configurations of that system. The modules carry no heat spreader and conform to the PC3L 14900 standard.

Suitable for compatible iMac upgrades

Owners of the specified 2015 iMac who want to add or replace memory with a tested dual-channel pair will find this kit appropriate. It is not intended for systems that require standard 1.5 V DDR3 modules. Builders working on Windows laptops or desktops that use different DDR generations should not use this product. The kit does not support platforms that demand higher speeds or alternative form factors.

DDR3L 1866 CL13 1.35 V specification

The decisive figure is the DDR3L 1866 speed grade combined with CL13 13-13-13-32 timings at 1.35 V. If the target iMac calls for this exact voltage and timing set, the kit matches the requirement. If the system needs a different voltage, speed or latency profile, this memory will not be compatible.

How it compares

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

Price $42.99
Cheaper than about 79% of the 21,161 comparable items (median $397.99).
Total capacity 8 GB (2 × 4 GB)
Lower than about 80% 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 $5.37 per GB
Cheaper than about 72% 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 nameMAR3S186DM4G18 × 2
Total capacity8 GB (2 × 4 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 × 5 mm
Compatibility
Compatible withiMac "Core i5/i7 in 27 in (Late 2015)

Questions about this item

Will the 1.35 V DDR3L 1866 modules run reliably in my Late-2015 27-inch iMac alongside the original Apple memory?

Yes, the kit is validated for the Late-2015 iMac Core i5/i7 27-inch and operates at the standard 1.35 V DDR3L voltage used by that model, so it will work with the factory-installed modules.

How can I confirm the 13-13-13-32 timings and 1866 MHz speed are active after installation?

Open System Report in macOS, select Memory, and verify each slot shows 4 GB, DDR3L, 1866 MHz and the CAS latency of 13.

Does the box contain only the two 4 GB SO-DIMMs, or are tools or adapters included?

The package includes the two 204-pin DDR3L SO-DIMM modules; no installation tools or additional adapters are supplied.

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