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Two green 200-pin DDR2 SO-DIMM modules with black chips, no heat spreader

Computer Memory Solutions

Computer Memory Solutions CM128645300SO 2GB (2 x 1GB) DDR2 667 memory upgrade

SKU CH-JCW2-JZCW9

DDR2 667 SO-DIMM kit adds 2 GB across two 1 GB modules for ThinkPad T43 notebooks

  • Total capacity2 GB (2 × 1 GB)
  • Rated speedDDR2 667 (PC2 5300)
  • ChipsetMajor Brand Chipset
  • CAS latencyCL5
  • Memory timings5-5-5
  • Rated voltage1.8 V
  • 2GB dual-channel kit boosts ThinkPad T43 responsiveness
  • DDR2-667 PC2-5300 speed matches factory specification
  • CL5 5-5-5 timings at 1.8V ensure stable operation
  • 200-pin unbuffered SODIMMs install without tools
  • Major-brand chips backed by CMS lifetime warranty

DDR2 667 SO-DIMM kit for ThinkPad T43

This kit supplies two 1 GB DDR2 667 (PC2-5300) modules in the 200-pin SO-DIMM form factor. It is built for the IBM Lenovo ThinkPad T43 notebook series and runs at 1.8 V with CL5 5-5-5 timing. The unbuffered, non-ECC design matches the original memory specification for those systems.

Tool-free slot access on the T43 underside

Installation requires removing the memory cover on the bottom of the notebook and pressing each module into the 200-pin socket until the retention clips lock. Common issues include inserting a module at the wrong angle, failing to seat it fully so the clips do not engage, or mixing these DDR2 sticks with any other DDR generation which physically will not fit.

Verify two free 200-pin slots and DDR2 667 support

Before ordering, confirm the ThinkPad T43 has both SO-DIMM sockets available and that the BIOS recognises DDR2 667 (PC2-5300) at CL5. The notebook must accept 1.8 V unbuffered non-ECC modules; systems limited to a different voltage, registered DIMMs or a lower maximum speed will not work with this kit.

How it compares

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

Price $9.99
Cheaper than about 97% of the 21,161 comparable items (median $397.99).
Total capacity 2 GB (2 × 1 GB)
Lower than about 95% of the 20,941 comparable items (median 32 GB).
Price per GB $5.00 per GB
Cheaper than about 77% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameComputer Memory Solutions
Model nameCM128645300SO
Total capacity2 GB (2 × 1 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 systemsIBM Lenovo Thinkpad T43 Notebook Series
In the box
Included items1 Memory RAM Stick

Questions about this item

How can I verify the CM128645300SO kit is running at 667 MHz after installation?

Open the BIOS or a system-information utility such as CPU-Z and confirm the memory frequency reads 667 MHz with timings of 5-5-5 at 1.8 V.

What exactly ships with the CM128645300SO package and is anything else required?

The box contains two 1 GB DDR2 200-pin SO-DIMM modules; no additional parts or tools are needed for a ThinkPad T43 upgrade.

Which capacity version of the CM128645300SO should I choose for a ThinkPad T43 with two memory slots?

This 2 GB kit (2 × 1 GB) fills both slots and matches the DDR2 667 specification supported by the T43 series.

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