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Single green 200-pin DDR2 SODIMM stick with black chips, no heat spreader

Computer Memory Solutions

Computer Memory Solutions 4GB DDR2 667MHz SODIMM for Apple iMac 20-Inch 2.4GHz

SKU CH-6S5X-DF9CS

4GB DDR2 667MHz SODIMM upgrades Apple iMac 20-inch 2.4GHz Core 2 Duo systems

  • Total capacity4 GB
  • Rated speedDDR2 667 (PC2 5300)
  • ChipsetMajor Brand Chipset
  • CAS latencyCL5
  • Memory timings5-5-5
  • Rated voltage1.8 V
  • 4GB capacity boosts multitasking on your iMac
  • DDR2 667MHz speed matches original system specs
  • 200-pin SODIMM form factor fits the memory slots
  • Non-ECC unbuffered design ensures stable operation
  • Guaranteed compatible with iMac 20-inch 2.4GHz Core 2 Duo

System-Specific DDR2 SODIMM

This 4 GB DDR2 667 MHz SODIMM is built for the Apple iMac 20-Inch 2.4 GHz Intel Core 2 Duo. It matches the exact pin count, voltage and timing that the original logic board expects. The module arrives as a single 4 GB stick using unbuffered, non-ECC chips.

Straightforward slot installation

The 200-pin edge connector drops into the iMac’s two SO-DIMM slots without tools or firmware updates. Because the system caps total memory at 6 GB, pairing this 4 GB module with the existing 2 GB stick fills the limit; a second 4 GB stick would exceed it. No heat spreader means the board sits flush in the tight chassis.

Steady output during long sessions

Running at 1.8 V with CL5 5-5-5 timings, the stick maintains its rated 667 MHz speed through extended workloads such as video encoding or large photo batches. Unbuffered major-brand chips keep signal integrity stable, so the iMac avoids throttling or memory errors even when both slots are populated for hours.

How it compares

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

Price $47.99
Cheaper than about 78% 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 $12.00 per GB
Pricier than about 57% 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 2.4 GHz Intel Core 2 Duo
In the box
Included items1 Memory RAM Stick

Questions about this item

How can I confirm the 4GB DDR2 667MHz SODIMM is running at the correct speed after installing it in my iMac 20-Inch 2.4GHz?

Open "About This Mac" in macOS and check the memory section; it should list the module as 4GB DDR2 667MHz (PC2-5300) in one of the two 200-pin slots.

What comes in the box with the CMS CM512645300SO module and what else is needed to reach the 6GB maximum?

The package contains one 4GB 200-pin DDR2 SO-DIMM stick; to reach the 6GB limit you must add a separate 2GB DDR2 667MHz SODIMM in the second slot.

Which capacity should I choose between the 4GB stick and a 2GB stick for the Apple iMac MA877LL?

Choose the 4GB module for the first slot to maximise capacity; the system supports 6GB total using one 4GB and one 2GB SODIMM in its two sockets.

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