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Two green DDR3L SODIMM sticks with black chips, no heat spreader

Computer Memory Solutions

Computer Memory Solutions 16GB DDR3L 1600 SODIMM 2x8GB iMac 27 2015

SKU CH-E451-8RNNB

A 16 GB dual-channel kit of 1.35 V DDR3L 1600 SODIMM modules built for the 27-inch 2015 iMac Retina 5K

  • Total capacity16 GB (2 × 8 GB)
  • Rated speedDDR3L 1600 (PC3L 12800)
  • ChipsetMajor Brand Chipset
  • CAS latencyCL11
  • Memory timings11-11-11
  • Rated voltage1.35 V
  • 16 GB total capacity for smoother multitasking
  • DDR3L 1600 MHz speed matches iMac 27 2015 spec
  • Low 1.35 V voltage reduces system power draw
  • 2×8 GB kit fills two slots for dual-channel performance
  • Guaranteed compatible with iMac Retina 5K 27-inch Mid 2015

iMac 27-inch Mid-2015 RAM Kit

This 16 GB kit contains two 8 GB DDR3L 1600 SODIMM modules built for the Apple iMac Retina 5K 27-inch Mid-2015 model MF886LL/A. The unbuffered non-ECC sticks run at 1.35 V with CL11 timing. Computer Memory Solutions manufactures the modules to guarantee compatibility with the specified system.

Suits owners upgrading that iMac to 16 GB

The 204-pin SO-DIMM form factor fits the four memory slots in the 2015 Retina 5K iMac. Buyers needing ECC registered memory cannot use this kit. Systems requiring a different DDR generation or a different pin count are not compatible.

DDR3L 1600 CL11 1.35 V specification

The modules operate at DDR3L 1600 (PC3L 12800) with 11-11-11 latency at 1.35 volts. This exact speed, voltage and timing combination is what the Mid-2015 27-inch iMac expects. Any deviation in those three values means the memory will not work correctly.

How it compares

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

Price $37.99
Cheaper than about 81% 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).
Price per GB $2.37 per GB
Cheaper than about 92% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameComputer Memory Solutions
Model nameCM10246412800SODRL
Total capacity16 GB (2 × 8 GB)
Product type204-Pin DDR3 SO-DIMM
Performance
Rated speedDDR3L 1600 (PC3L 12800)
Processor
ChipsetMajor Brand Chipset
Memory
CAS latencyCL11
Memory timings11-11-11
ECC supportNo
Buffer typeUnbuffered
Memory rank2Rx8
Heat spreaderNo
Power
Rated voltage1.35 V
Compatibility
Compatible systemsApple Imac Retina 5K 27 in (Mid 2015) Mf886Ll/A
In the box
Included items2 Memory RAM Sticks

Questions about this item

How do I install the two 8 GB DDR3L SODIMM modules in the four slots of my 27-inch 2015 iMac, and what mistake should I avoid?

Power off and unplug the iMac, lay it face-down on a soft cloth, remove the memory-access door, then insert each 204-pin module into a slot until the ejector clips click; the common error is pressing only one end so the stick sits crooked and the Mac fails to boot.

What maintenance or replacement will this memory need during the life of the iMac?

No routine maintenance is required; the unbuffered non-ECC DDR3L modules have no moving parts or batteries, so they either keep working or are replaced only if a stick fails or you later upgrade to the 32 GB maximum supported by the four slots.

What limit appears first when the iMac runs sustained workloads with these CL11 1.35 V modules?

The memory controller caps bandwidth at DDR3L 1600 speeds, so throughput tops out at the PC3L-12800 rating long before the 11-11-11 latency or 1.35 V voltage become bottlenecks.

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