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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

  • Capacity16GB (2 x 8GB)
  • Type204-Pin DDR3 SO-DIMM
  • SpeedDDR3L 1600 (PC3L 12800)
  • CAS LatencyCL11
  • Timing11-11-11
  • Voltage1.35V
  • 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.

Highlights

  • 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

Specifications

BrandComputer Memory Solutions
ModelCM10246412800SODRL
Capacity16GB (2 x 8GB)
Type204-Pin DDR3 SO-DIMM
SpeedDDR3L 1600 (PC3L 12800)
CAS LatencyCL11
Timing11-11-11
Voltage1.35V
ECCNo
Buffered/RegisteredUnbuffered
Rank2Rx8
ChipsetMajor Brand Chipset
Heat SpreaderNo
Compatible SystemApple Imac Retina 5K 27-Inch (Mid 2015) Mf886Ll/A
Package Content2 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.

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

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