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Two green DDR3 SO-DIMM sticks side by side

Computer Memory Solutions

Computer Memory Solutions 16GB (2x8GB) DDR3 1333 SODIMM for Apple iMac 27-inch 3.4GHz Core i7 memory upgrade

SKU CH-Q4MP-C1CN0

16 GB dual-channel DDR3 kit (2 × 8 GB, 1333 MHz, CL9, 1.5 V) validated for 27-inch iMac 3.4 GHz Core i7 and 3.1 GHz Core i5

  • Total capacity16 GB (2 × 8 GB)
  • Rated speedDDR3 1333 (PC3 10600)
  • ChipsetMajor Brand Chipset
  • CAS latencyCL9
  • Memory timings9-9-9
  • Rated voltage1.5 V
  • 16 GB kit expands iMac memory to the Apple-supported maximum
  • DDR3 1333 MHz CL9 modules match factory timing exactly
  • 204-pin SO-DIMM form factor fits the 27-inch iMac slots
  • 5 V unbuffered non-ECC design ensures stable operation
  • Two 8 GB sticks populate two of four sockets for 32 GB headroom

Memory Kit for 27-inch iMac

This 16 GB kit contains two 8 GB DDR3 SO-DIMM modules rated at 1333 MHz with CL9 timing. It is built for the 27-inch iMac models running a 3.4 GHz Core i7 or a 3.1 GHz Core i5 and matches the factory DDR3-10600 specification.

Thermals and Power

Each module operates at the standard 1.5 V DDR3 voltage and carries no heat spreader, relying on the iMac’s internal airflow. Unbuffered, non-ECC chips keep the electrical load low, so the memory adds minimal heat and draws no extra power beyond the stock configuration.

Build Fit

The 204-pin sticks install directly into the iMac’s four SO-DIMM slots, leaving two sockets free for a future upgrade to the 32 GB ceiling. Buyers who need ECC, registered DIMMs or a different DDR generation cannot use this kit.

How it compares

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

Price $48.99
Cheaper than about 78% 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 $3.06 per GB
Cheaper than about 89% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameComputer Memory Solutions
Model nameCM10246410600SODRH
Total capacity16 GB (2 × 8 GB)
Product type204-Pin DDR3 SO-DIMM
Performance
Rated speedDDR3 1333 (PC3 10600)
Processor
ChipsetMajor Brand Chipset
Memory
CAS latencyCL9
Memory timings9-9-9
ECC supportNo
Buffer typeUnbuffered
Memory rank2Rx8
Heat spreaderNo
Power
Rated voltage1.5 V
Compatibility
Compatible systemsApple Imac 27 in 3.4 GHz Intel Core I7
In the box
Included items2 Memory RAM Sticks

Questions about this item

How do I install the 204-pin DDR3 SO-DIMM modules into the iMac 27-inch and what step is often missed?

Power off, unplug, lay the screen face-down on a soft cloth, press the memory door button to open the compartment, eject any existing modules by spreading the side clips, align the notch on each 8 GB stick with the slot key, press firmly until the clips snap shut, then replace the door before turning the iMac upright.

What maintenance or replacement will the CM10246410600SODRH kit need over time?

The unbuffered non-ECC DDR3 modules have no moving parts and require no scheduled maintenance; replacement is only necessary if a stick fails, which is covered by the manufacturer's limited lifetime warranty when purchased directly from Computer Memory Solutions.

What limit appears first when the iMac 3.4 GHz Core i7 runs sustained workloads with 16 GB installed?

Apple officially supports 16 GB for this model, so the firmware-recognised capacity ceiling is reached before any thermal or voltage throttle from the 1.5 V CL9 memory itself.

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