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

Computer Memory Solutions

Computer Memory Solutions CM512648500SODRH 16GB (4x4GB) DDR3 1066MHz CL7 SODIMM memory upgrade

SKU CH-7PWZ-NC5F0

16 GB DDR3 kit with four 4 GB SODIMM modules at 1066 MHz CL7 for Apple iMac Core i7 2.8 27-inch Late 2009

  • Total capacity16 GB (4 × 4 GB)
  • Rated speedDDR3 1066 (PC3 8500)
  • ChipsetMajor Brand Chipset
  • CAS latencyCL7
  • Memory timings7-7-7
  • Rated voltage1.5 V
  • 16 GB kit fills all four iMac slots
  • DDR3 1066 MHz CL7 matches Apple spec
  • 204-pin SODIMM form factor fits late-2009 27-inch iMac
  • 5 V unbuffered non-ECC design for stable operation
  • Four matched 4 GB modules enable dual-channel performance

Targeted Mac upgrade

This 16 GB kit is built specifically for the Apple iMac "Core i7" 2.8 27-Inch from Late 2009. It delivers the exact DDR3 1066 MHz specification that model requires. Buyers who need memory for any other Mac or PC platform should look elsewhere.

Four-slot capacity ceiling

Four 4 GB modules fill every available socket and reach the machine's 16 GB limit. The CL7 timing and 1.5 V voltage match the original specification, so the system runs at full rated speed. Users who want more than 16 GB cannot expand further on this hardware.

Direct drop-in installation

The 204-pin SO-DIMM form factor slides straight into the iMac's memory slots without adapters or configuration changes. Unbuffered, non-ECC design keeps compatibility simple. Builders working on non-Apple systems or newer Macs will find these modules physically and electrically incompatible.

How it compares

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

Price $81.99
Cheaper than about 70% 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 $5.12 per GB
Cheaper than about 75% 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 nameCM512648500SODRH
Total capacity16 GB (4 × 4 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 "Core I7 in 2.8 27 in (Late 2009)
In the box
Included items4 Memory RAM Sticks

Questions about this item

Will the 4x4GB DDR3 1066MHz CL7 SODIMM kit run reliably alongside any existing 1066MHz modules I keep in my Late 2009 iMac?

Yes, all four sticks are PC3-8500 1066MHz CL7 1.5V unbuffered non-ECC 2Rx8 modules, so they match the iMac's native speed and timing; install them in the four SO-DIMM slots for 16GB total.

How can I verify the 16GB kit is recognised at the correct 1066MHz CL7 settings after installation?

Open About This Mac → System Report → Memory; you should see four 4GB DDR3 SODIMMs running at 1066MHz with CAS latency 7 and 1.5V voltage.

What exactly ships in the box and is anything else required to complete the upgrade?

The package contains four 4GB 204-pin DDR3 SODIMM sticks — nothing else is needed; the Late 2009 27-inch iMac has four accessible slots and no tools are required.

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