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Four green 204-pin DDR3 SODIMM modules, no heat spreaders

Computer Memory Solutions

Computer Memory Solutions 16GB (4x4GB) DDR3 1333MHz CL7 SODIMM for iMac 21.5" Mid-2010

SKU CH-0D7C-1R6HM

A 16 GB kit of four DDR3 1333 MHz CL7 SODIMM modules for the 21.5-inch iMac (Mid-2010)

  • Total capacity16 GB (4 × 4 GB)
  • Rated speedDDR3 1333 (PC3 10600)
  • ChipsetMajor Brand Chipset
  • CAS latencyCL7
  • Memory timings7-7-7
  • Rated voltage1.5 V
  • 16 GB total capacity across four 4 GB modules
  • DDR3 1333 MHz CL7 timing for responsive performance
  • 204-pin SO-DIMM form factor fits the iMac 21.5″ Mid-2010
  • 5 V unbuffered non-ECC design matches system requirements
  • Lifetime warranty from Computer Memory Solutions

16 GB DDR3 kit for 21.5-inch iMac Mid-2010

This 16 GB kit contains four 4 GB DDR3 1333 MHz SO-DIMM modules built for the 21.5-inch iMac Mid-2010 with a 3.6 GHz Core i5 processor. It fills all four memory slots and reaches the model's 16 GB maximum capacity. The unbuffered, non-ECC design matches the original specification.

Four matched modules remove mixing risk

The kit supplies four identical 204-pin sticks rated at CL7 7-7-7 timing and 1.5 V. Because every module comes from the same production batch, the memory controller sees uniform electrical characteristics. This avoids the instability that can appear when different ranks or latencies are combined in the four-slot layout.

Straightforward slot access with one common pitfall

The SO-DIMM slots are reached by removing the bottom access door on the iMac, requiring only a Phillips screwdriver. Each module keys into its 204-pin socket in one orientation. The frequent mistake is not pressing firmly enough until the side clips click, which leaves the stick partially seated and causes a boot failure.

How it compares

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

Price $72.99
Cheaper than about 72% of the 21,161 comparable items (median $397.99).
Total capacity 16 GB (4 × 4 GB)
Lower than about 70% of the 20,941 comparable items (median 32 GB).
Price per GB $4.56 per GB
Cheaper than about 81% of the 20,941 comparable items (median $8.19 per GB).

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

Specifications

Product
Brand nameComputer Memory Solutions
Model nameCM5126410600SODRH
Total capacity16 GB (4 × 4 GB)
Product type204-Pin DDR3 SO-DIMM
Performance
Rated speedDDR3 1333 (PC3 10600)
Processor
ChipsetMajor Brand Chipset
Memory
CAS latencyCL7
Memory timings7-7-7
ECC supportNo
Buffer typeUnbuffered
Memory rank2Rx8
Heat spreaderNo
Power
Rated voltage1.5 V
Compatibility
Compatible systemsApple Imac "Core I5 in 3.6 21.5 in (Mid-2010)
In the box
Included items4 Memory RAM Sticks

Questions about this item

Will the 204-pin DDR3 SODIMM modules need any firmware updates or pairing after installation?

No firmware updates or pairing are required; the four 4 GB sticks install directly into the four SO-DIMM slots of the Mid-2010 iMac and are recognised immediately.

What thermal limit appears first when the 1.5 V CL7 kit runs continuously in the 21.5-inch iMac?

The iMac's internal airflow becomes the limiting factor; the memory itself has no heat spreader, so sustained loads raise case temperature until the system throttles.

How much power does the 16 GB DDR3 1333 MHz kit draw when the iMac is under all-day load?

Each 4 GB module operates at 1.5 V, so the full 16 GB set draws roughly 8–10 W total under continuous use.

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