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Two green circuit-board SO-DIMM sticks with black memory chips, 204-pin DDR3, no heat spreader

Computer Memory Solutions

Computer Memory Solutions CM5126412800SODRH 8GB (2x4GB) DDR3-1600 SO-DIMM

SKU CH-CVCP-GES38

8GB DDR3-1600 SO-DIMM kit (2×4GB) validated for the Late 2013 27-inch iMac with 3.5 GHz Core i7

  • Total capacity8 GB (2 × 4 GB)
  • Rated speedDDR3 1600 (PC3 12800)
  • ChipsetMajor Brand Chipset
  • CAS latencyCL11
  • Memory timings11-11-11
  • Rated voltage1.5 V
  • 8GB dual-channel kit upgrades late-2013 27-inch iMac to 32 GB max
  • DDR3-1600 CL11 1.5 V modules deliver 12800 MB/s bandwidth
  • 204-pin SO-DIMM form factor fits Apple iMac14,2 A1419 slots exactly
  • Two 4 GB unbuffered non-ECC sticks install in seconds with no tools
  • Lifetime warranty from Computer Memory Solutions backs every module

Apple iMac Late 2013 memory kit

This 8 GB kit contains two 4 GB DDR3 SO-DIMM modules rated at 1600 MHz with CL11 timings. It is built for the Apple iMac "Core i7" 3.5 27-Inch (Late 2013) and uses the 204-pin form factor at 1.5 V. The unbuffered, non-ECC design matches the original system specification.

Suits owners of the specified iMac model

Buyers upgrading the compatible iMac 27-inch late 2013 system can install this pair directly into the available slots. The kit supports the platform maximum of 32 GB across four sockets. Builders working on any other desktop, laptop, or server platform cannot use these modules because the pin layout, voltage, and DDR3 generation are specific to this Apple computer.

1600 MHz DDR3 speed rating

The decisive specification is the PC3-12800 1600 MHz DDR3 rating combined with 204-pin SO-DIMM packaging. Only systems that require exactly this speed, voltage, and physical connector will accept the memory. Verify the iMac model identifier A1419 or iMac14,2 before purchase to ensure the correct match.

How it compares

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

Price $21.99
Cheaper than about 89% 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).
Price per GB $2.75 per GB
Cheaper than about 91% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameComputer Memory Solutions
Model nameCM5126412800SODRH
Total capacity8 GB (2 × 4 GB)
Product type204-Pin DDR3 SO-DIMM
Performance
Rated speedDDR3 1600 (PC3 12800)
Processor
ChipsetMajor Brand Chipset
Memory
CAS latencyCL11
Memory timings11-11-11
ECC supportNo
Buffer typeUnbuffered
Memory rank2Rx8
Heat spreaderNo
Power
Rated voltage1.5 V
Compatibility
Compatible systemsApple Imac "Core I7 in 3.5 27 in (Late 2013)
In the box
Included items2 Memory RAM Sticks

Questions about this item

How do I install the 204-pin SO-DIMM modules into the four slots of the Late 2013 iMac?

Remove the bottom access door, eject the existing sticks by spreading the side clips, then insert each 204-pin module at a slight angle until the gold edge disappears and the clips snap shut — the step often missed is pressing firmly enough to hear both clicks.

What maintenance or replacement will this 1.5 V DDR3 kit need over time?

No routine maintenance is required; the unbuffered modules have no heat spreader or moving parts, so replacement only occurs if a stick fails or the system is upgraded to the 32 GB maximum supported by the four slots.

What limit appears first when the iMac runs sustained heavy workloads with this memory?

The four-slot, 32 GB ceiling is reached before any memory bandwidth bottleneck, because the 1600 MHz CL11 timing matches the platform’s native specification and cannot be exceeded without changing the CPU or logic board.

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