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Two green DDR2 SO-DIMM sticks with black chips

Computer Memory Solutions

Computer Memory Solutions CM256646400SO 4GB (2x2GB) DDR2 800MHz memory upgrade

SKU CH-94JZ-KBTB7

4GB DDR2 800MHz SO-DIMM kit for early-2008 20-inch iMac Core 2 Duo 2.4

  • Total capacity4 GB (2 × 2 GB)
  • Rated speedDDR2 800 (PC2 6400)
  • ChipsetMajor Brand Chipset
  • CAS latencyCL6
  • Memory timings6-6-6
  • Rated voltage1.8 V
  • 4GB kit upgrades Early 2008 iMac 2.4 GHz to 6 GB max
  • Two 2 GB DDR2 800 MHz SO-DIMMs install in the two memory slots
  • CL6 6-6-6 timing at 1.8 V delivers stable system responsiveness
  • Unbuffered non-ECC 200-pin modules match Apple MB323LL/A specifications exactly
  • Major-brand chips backed by CMS lifetime warranty ensure long-term reliability

Targeted iMac upgrade

This 4 GB kit (2 × 2 GB) uses 200-pin DDR2 SO-DIMM modules rated at 800 MHz (PC2-6400) with CL6 timings. It is built specifically for the Apple iMac "Core 2 Duo" 2.4 20-Inch Early 2008 (model identifiers MB323LL/A, iMac8,1, A1224). The unbuffered, non-ECC design matches the original factory specification.

Sustained load behaviour

At the rated 1.8 V the modules maintain their 6-6-6 timings continuously without dropping to lower speeds. The major-brand chipset and 2Rx8 organisation keep data integrity stable during long work sessions. The system maximum of 6 GB across the two sockets means this kit leaves one slot free for a further 2 GB module if required.

Thermals noise power

With no heat spreader fitted, the sticks rely on the iMac's internal airflow for cooling. Power draw stays at the standard DDR2 1.8 V level, adding minimal load to the power supply. Silent operation is assured because the memory produces no audible noise and does not trigger extra fan activity under normal use.

How it compares

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

Price $12.99
Cheaper than about 95% 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 $3.25 per GB
Cheaper than about 88% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameComputer Memory Solutions
Model nameCM256646400SO
Total capacity4 GB (2 × 2 GB)
Product type200-Pin DDR2 SO-DIMM
Performance
Rated speedDDR2 800 (PC2 6400)
Processor
ChipsetMajor Brand Chipset
Memory
CAS latencyCL6
Memory timings6-6-6
ECC supportNo
Buffer typeUnbuffered
Memory rank2Rx8
Heat spreaderNo
Power
Rated voltage1.8 V
Compatibility
Compatible systemsApple Imac "Core 2 Duo" 2.4 20 in Early 2008
In the box
Included items2 Memory RAM Sticks

Questions about this item

How much heat and power does this 1.8V DDR2 kit draw during all-day use?

The modules run at the standard DDR2 voltage of 1.8V without a heat spreader, so they add minimal warmth and draw only the power the iMac memory controller supplies.

What must my iMac already have for these two 200-pin SO-DIMMs to install and boot?

Your Apple iMac "Core 2 Duo" 2.4 20-Inch Early 2008 needs two free SO-DIMM slots and a firmware that recognises PC2-6400 CL6 unbuffered memory.

Will this PC2-6400 CL6 pair work with the original memory sticks already in the iMac?

Computer Memory Solutions guarantees compatibility with the specified iMac model; the kit is tested to run alongside the factory-installed modules in that system.

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