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Two green 204-pin DDR3 SO-DIMM modules with black chips, no heat spreader

Computer Memory Solutions

Computer Memory Solutions 8GB (2x4GB) DDR3 1333 SO-DIMM A29

SKU CH-JWA5-94WZB

8GB DDR3 1333 SO-DIMM kit for 27-Inch Mid-2011 iMac Core i7 3.4 systems

  • Total capacity8 GB (2 × 4 GB)
  • Rated speedDDR3 1333 (PC3 10600)
  • ChipsetMajor Brand Chipset
  • CAS latencyCL7
  • Memory timings7-7-7
  • Rated voltage1.5 V
  • 8GB dual-channel kit boosts multitasking on compatible iMac
  • DDR3 1333 CL7 timing speeds up memory access
  • 5 V unbuffered modules run at standard voltage
  • 204-pin SO-DIMM form factor fits Mid-2011 27-inch iMac
  • Lifetime warranty from CMS protects your upgrade investment

Tailored for 27-inch iMac Mid-2011

This 8 GB kit delivers two 4 GB DDR3 1333 SO-DIMM modules built specifically for the Apple iMac "Core i7" 3.4 27-Inch (Mid-2011). It targets owners of that exact all-in-one who need to restore or expand system memory without guessing compatibility. Unbuffered, non-ECC sticks with CL7 timing match the original specification.

Fills two of four available slots

The computer accepts up to 32 GB across four sockets, so this pair occupies half the capacity while leaving room for further upgrades. Each module uses a 204-pin edge connector and standard 1.5 V operation, requiring no special cooling or voltage adjustment. Installation follows the standard user-accessible memory door procedure.

Low-profile modules run at standard voltage

Without heat spreaders, the sticks rely on the iMac's internal airflow, which is designed for bare SO-DIMMs at 1333 MHz. Power draw stays within the factory memory budget, and the CL7 7-7-7 timing keeps latency tight for everyday workloads. No additional fan noise or thermal headroom is needed beyond the stock cooling solution.

How it compares

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

Price $41.99
Cheaper than about 80% 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 $5.25 per GB
Cheaper than about 73% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameComputer Memory Solutions
Model nameCM5126410600SODRH
Total capacity8 GB (2 × 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 I7 in 3.4 27 in (Mid-2011)
In the box
Included items2 Memory RAM Sticks

Questions about this item

Will the CL7 timing hold under sustained load without throttling?

The modules run at CL7 7-7-7 timings at 1333 MHz with 1.5 V, so the rated latency is maintained as long as the iMac cooling keeps the memory within its thermal envelope.

How much heat and noise do the sticks add during all-day use?

The SO-DIMMs have no heat spreader and draw standard 1.5 V DDR3 power; they add negligible heat and make no noise, relying on the iMac's existing airflow.

Which iMac models must I already own for this kit to work?

The kit is validated for the Apple iMac "Core i7" 3.4 27-Inch (Mid-2011) identifiers iMac12,2 and A1312 with four SO-DIMM slots supporting up to 32 GB total.

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