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Two green DDR2 SO-DIMM sticks with black chips, no heat spreader

Computer Memory Solutions

Computer Memory Solutions CM256646400SO 4GB DDR2 800 memory upgrade

SKU CH-X5HY-M86R9

A 4 GB kit of two DDR2 SO-DIMM modules running at 800 MHz for the 24-inch iMac 2.8 GHz Core 2 Duo

  • Total capacity4 GB (2 × 2 GB)
  • Rated speedDDR2 800 (PC2 6400)
  • ChipsetMajor Brand Chipset
  • CAS latencyCL6
  • Memory timings6-6-6
  • Rated voltage1.8 V
  • 4 GB kit (2 × 2 GB) expands iMac memory to 6 GB max
  • DDR2 800 MHz CL6 timing matches Apple 24-inch 2.8 GHz spec
  • 200-pin SODIMM form factor fits both factory slots directly
  • Unbuffered non-ECC design ensures stable operation at 1.8 V
  • Major-brand chips backed by CMS lifetime warranty

Matched 4 GB kit for the named 24-inch iMac

This two-stick set delivers 4 GB of DDR2 800 memory in the 200-pin SO-DIMM form factor required by the Apple iMac 24-inch 2.8 GHz Intel Core 2 Duo (MB325LL/A). The modules run at 1.8 V with CL6 6-6-6 timing and are unbuffered non-ECC.

Suits owners of that specific iMac model

The kit is built for the exact system listed in the compatibility data; other iMac sizes, other processor speeds or systems that require a different pin count, voltage or memory generation will not accept these modules.

Key specification is DDR2 800 200-pin SO-DIMM

Only computers designed for DDR2 800 (PC2-6400) 200-pin unbuffered non-ECC SO-DIMMs can use this upgrade; the memory type and physical interface are the deciding factors.

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 24 in 2.8 GHz Intel Core 2 Duo (MB325Ll/A
In the box
Included items2 Memory RAM Sticks

Questions about this item

Does the CM256646400SO kit include anything besides the two 2 GB SODIMM modules?

The package contains exactly two 200-pin DDR2 SO-DIMM sticks totalling 4 GB; no tools, cables or documentation are mentioned.

Why choose the 4 GB kit instead of a single 2 GB or 4 GB module for the iMac 24-inch 2.8 GHz Core 2 Duo?

The iMac has two slots and a 6 GB maximum, so a matched 2 × 2 GB kit fills both sockets for dual-channel operation while leaving room for a future 2 GB upgrade.

What does the PC2-6400 800 MHz rating mean once the memory is installed in that iMac?

It confirms the modules run at 800 MHz with CL6 timing at 1.8 V, matching the iMac's native DDR2 bus speed for full compatibility.

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