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Four green DDR3 SODIMM sticks with black chips, no heat spreaders

Computer Memory Solutions

Computer Memory Solutions CM5126410600SODRH 16GB (4x4GB) DDR3 1333MHz SODIMM for iMac 21.5 Mid-2010

SKU CH-ZHF2-FRX8D

A 16 GB DDR3 kit with four 4 GB SODIMM modules rated at 1333 MHz for the 21.5-inch iMac from 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 in a matched 4 x 4 GB kit
  • DDR3 1333 MHz PC3-10600 speed for responsive system performance
  • CL7 7-7-7 timing with 1.5 V unbuffered operation
  • 204-pin SODIMM form factor built for the 21.5-inch iMac (Mid 2010)
  • Lifetime warranty from Computer Memory Solutions when purchased directly

Kit details

This 16GB kit contains four 4GB DDR3 SODIMM modules rated at 1333MHz with CL7 timings. It is built for the 21.5-inch iMac with a 3.06GHz Core i3 processor from mid-2010. Each stick uses a 204-pin layout and runs at 1.5V without ECC or buffering.

Capacity and headroom

Filling all four slots delivers the 16GB maximum the system officially supports. The 1333MHz speed matches the platform's native memory controller, so the modules operate at their rated frequency without downclocking. Unbuffered 2Rx8 organisation keeps latency low for everyday multitasking and media work.

Upgrade context

The kit replaces the factory-installed memory, which typically shipped as two 2GB or two 4GB modules, and doubles the total to the ceiling Apple defined for this model. Buyers who need more than 16GB cannot use this platform. The jump is worthwhile when the machine still handles your daily workload but feels constrained by the original amount.

How it compares

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

Price $71.99
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 $4.50 per GB
Cheaper than about 81% of the 20,941 comparable items (median $8.19 per GB).

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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 I3 in 3.06 21.5 in (Mid-2010)
In the box
Included items4 Memory RAM Sticks

Questions about this item

Will these four 4 GB DDR3 1333 MHz modules fill all four slots in my Mid-2010 21.5-inch iMac?

Yes, the kit provides 16 GB total across four sticks and the system has four sockets with a 16 GB maximum, so every slot is populated.

How can I verify the Mac recognises the full 16 GB after installation?

Open About This Mac or System Report; both should show 16 GB of 1333 MHz DDR3 memory with all four banks occupied.

What ships in the package and is anything else required?

The box contains four 204-pin SODIMM modules; no cables, tools or additional parts are needed for the upgrade.

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