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Two green circuit-board SO-DIMM sticks with black chips

Computer Memory Solutions

Computer Memory Solutions CM5126412800SOSRL 8GB (2x4GB) DDR3L 1600 memory upgrade

SKU CH-0124-RMZF7

Two 4 GB DDR3L 1600 SO-DIMM modules at 1.35 V for the Late 2013 27-inch iMac Core i7 3.5

  • Capacity8GB (2 x 4GB)
  • Type204-Pin DDR3 SO-DIMM
  • SpeedDDR3L 1600 (PC3L 12800)
  • CAS LatencyCL11
  • Timing11-11-11
  • Voltage1.35V
  • 8 GB kit expands iMac memory for smoother multitasking
  • 1600 MHz DDR3L speed matches Late 2013 iMac specification
  • 35 V low-voltage modules reduce power draw and heat
  • CL11 11-11-11 timings deliver responsive system performance
  • 204-pin SO-DIMM form factor fits both iMac memory slots

Tailored Apple iMac upgrade

This 8 GB kit contains two 4 GB DDR3L SO-DIMM modules built specifically for the Apple iMac Core i7 3.5 27-Inch (Late 2013) model MF125LL/A. Each stick uses a 204-pin layout and runs at 1.35 V. The kit fills both memory slots to reach the system's 16 GB maximum capacity. It is intended for owners of that exact iMac seeking a straightforward capacity increase.

Steady CL11 operation at 1600 MHz

The modules operate at DDR3L 1600 (PC3L 12800) with CL11 11-11-11 timings across sustained workloads. Unbuffered, non-ECC 1Rx8 organisation delivers consistent throughput for everyday multitasking and media editing. Low 1.35 V voltage reduces thermal pressure inside the compact all-in-one chassis during extended sessions. Stability is maintained without a heat spreader under normal operating conditions.

Direct slot fit with lifetime exchange

Standard 204-pin SO-DIMM connectors align with the iMac's two memory slots for tool-free installation. Major-brand chipsets are used on every module to minimise compatibility risk. The manufacturer provides a limited lifetime exchange or repair warranty against defects when purchased directly. Buyers needing ECC error correction or registered buffering should look elsewhere.

Highlights

  • 8 GB kit expands iMac memory for smoother multitasking
  • 1600 MHz DDR3L speed matches Late 2013 iMac specification
  • 35 V low-voltage modules reduce power draw and heat
  • CL11 11-11-11 timings deliver responsive system performance
  • 204-pin SO-DIMM form factor fits both iMac memory slots

Specifications

BrandComputer Memory Solutions
ModelCM5126412800SOSRL
Capacity8GB (2 x 4GB)
Type204-Pin DDR3 SO-DIMM
SpeedDDR3L 1600 (PC3L 12800)
CAS LatencyCL11
Timing11-11-11
Voltage1.35V
ECCNo
Buffered/RegisteredUnbuffered
Rank1Rx8
ChipsetMajor Brand Chipset
Heat SpreaderNo
Compatible SystemApple iMac"Core i7" 3.5 27-Inch (Late 2013) MF125LL/A
Package Content2 Memory RAM Sticks

Questions about this item

How much power does the DDR3L 1.35V kit draw when the iMac runs all day?

Each module operates at 1.35V, lower than standard DDR3, so the pair draws less power and generates less heat inside the 27-Inch Late 2013 chassis.

What must the iMac already have for this 204-pin SO-DIMM pair to install?

Two free DDR3 SO-DIMM slots; the Late 2013 27-Inch iMac ships with two user-accessible slots, so the 2 x 4GB kit fills them directly.

Will the CL11 1600MHz sticks work with the original 1600MHz memory Apple fitted in 2013?

Yes, both run at DDR3-1600; the Mac will clock the new CL11 modules to match the existing timings automatically.

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