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Two green circuit boards with gold edge connectors and black memory chips

Computer Memory Solutions

Computer Memory Solutions 4GB (2x2GB) DDR3 1066MHz SO-DIMM for iMac Early/Late 2009

SKU CH-GCYH-QEZJH

A 4 GB DDR3 SO-DIMM kit built for iMac Early and Late 2009 Core 2 Duo models

  • Total capacity4 GB (2 × 2 GB)
  • Rated speedDDR3 1066 (PC3 8500)
  • ChipsetMajor Brand Chipset
  • CAS latencyCL7
  • Memory timings7-7-7
  • Rated voltage1.5 V
  • 4GB kit upgrades iMac Early/Late 2009 Core 2 Duo
  • 204-pin SO-DIMM form factor fits factory memory slots
  • DDR3 1066 MHz PC3-8500 speed matches original spec
  • CL7 7-7-7 timing with 1.5V operation for stable performance
  • 2Rx8 unbuffered modules from major brand chipset ensure compatibility

4GB DDR3 SO-DIMM Kit for 2009 iMac

This two-module kit delivers 4GB of DDR3 1066MHz memory in the 204-pin SO-DIMM format required by Apple iMac Early and Late 2009 Core 2 Duo models. It is built for owners restoring or maintaining these specific all-in-one desktops.

4GB total capacity with CL7 timing

The paired 2GB modules run at PC3-8500 speed with 7-7-7 timings at 1.5V, filling both available slots for the maximum supported configuration in a two-socket machine. Systems needing more than 4GB per module or registered ECC memory cannot use this kit.

Two matched sticks in the package

The box contains exactly two SO-DIMM sticks tested together for the listed iMac models. No heat spreaders, software utilities or additional brackets are included, so installers rely on the existing chassis cooling and firmware detection.

How it compares

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

Price $11.99
Cheaper than about 96% of the 21,161 comparable items (median $397.99).
Total capacity 4 GB (2 × 2 GB)
Lower than about 90% of the 20,941 comparable items (median 32 GB).
Price per GB $3.00 per GB
Cheaper than about 90% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameComputer Memory Solutions
Model nameCM256648500SODRH
Total capacity4 GB (2 × 2 GB)
Product type204-Pin DDR3 SO-DIMM
Performance
Rated speedDDR3 1066 (PC3 8500)
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 Early 2009 Lat 2009 Core 2 Duo
In the box
Included items2 Memory RAM Sticks

Questions about this item

Will the 204-pin DDR3 1066 MHz modules work with the original 2 GB sticks already in my Late 2009 iMac?

Yes, both the original and these modules run at 1066 MHz and 1.5 V, so they will operate together at the same speed without timing conflicts.

How can I confirm the iMac recognises the full 4 GB after installing the 2Rx8 CL7 SO-DIMMs?

Open About This Mac or System Profiler; it should show 4 GB total across the two slots at 1066 MHz with CL7 timing.

Does the kit include only the two 2 GB SO-DIMMs, or are tools and thermal pads also supplied?

The package contains just the two 204-pin DDR3 1066 MHz memory sticks; no screwdrivers, thermal pads or other accessories are included.

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