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Green circuit board with black memory chips and gold edge connector

Computer Memory Solutions

Computer Memory Solutions 4GB DDR2 667MHz SO-DIMM for iMac 20-inch 2.0GHz MA876LL/A

SKU CH-8G1B-GK9C3

A 4 GB DDR2 667 MHz SO-DIMM module designed for the 20-inch iMac 2.0 GHz Intel Core 2 Duo

  • Total capacity4 GB
  • Rated speedDDR2 667 (PC2 5300)
  • ChipsetMajor Brand Chipset
  • CAS latencyCL5
  • Memory timings5-5-5
  • Rated voltage1.8 V
  • 4GB capacity lets you reach the 6GB iMac limit
  • 667MHz DDR2 speed matches the original specification
  • 200-pin SO-DIMM form factor fits the iMac memory slots
  • CL5 latency with 5-5-5 timing for stable operation
  • Unbuffered non-ECC design works with the Apple memory controller

Targeted iMac upgrade

This 4GB DDR2 667MHz SO-DIMM is built specifically for the Apple iMac 20-inch 2.0GHz Intel Core 2 Duo MA876LL/A. It addresses the exact memory slot and timing requirements of that model so owners can extend usable system memory without compatibility guesswork.

Straightforward laptop-style install

The 200-pin SO-DIMM seats in the iMac's user-accessible memory door using standard notebook installation steps. No heat spreader means the module fits the tight clearance, but the 2Rx8 rank layout requires the second slot to hold a 2GB stick to reach the 6GB system maximum.

4GB single-module capacity

One stick delivers 4GB at PC2-5300 speeds with CL5 5-5-5 timing at 1.8V unbuffered non-ECC operation. The iMac's two-slot design caps total memory at 6GB when paired with a 2GB module, so this kit cannot serve systems needing 8GB or dual-channel matched pairs.

How it compares

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

Price $50.99
Cheaper than about 77% of the 21,161 comparable items (median $397.99).
Total capacity 4 GB
Lower than about 90% of the 20,941 comparable items (median 32 GB).
Price per GB $12.75 per GB
Pricier than about 59% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameComputer Memory Solutions
Model nameCM512645300SO
Total capacity4 GB
Product type200-Pin DDR2 SO-DIMM
Performance
Rated speedDDR2 667 (PC2 5300)
Processor
ChipsetMajor Brand Chipset
Memory
CAS latencyCL5
Memory timings5-5-5
ECC supportNo
Buffer typeUnbuffered
Memory rank2Rx8
Heat spreaderNo
Power
Rated voltage1.8 V
Compatibility
Compatible systemsApple Imac 20 in 2.0 GHz Intel Core 2 Duo Ma876Ll/A
In the box
Included items1 Memory RAM Stick

Questions about this item

How can I confirm the module is running at the correct speed after installing it in my iMac 20-inch 2.0GHz MA876LL/A?

Open About This Mac and check the Memory tab — it should show a 4 GB DDR2 667 MHz SO-DIMM in one of the two slots.

What comes in the package and is anything else required for installation?

The box contains one 4 GB 200-pin DDR2 SO-DIMM stick; no extra parts or tools are needed to fit it into the iMac's memory slots.

Should I choose this 4 GB stick or a different capacity for my MA876LL/A?

This 4 GB module is the largest single stick the system accepts; pair it with a 2 GB stick in the second slot to reach the 6 GB maximum.

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