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Green 200-pin DDR2 SO-DIMM memory module, no heat spreader

Computer Memory Solutions

Computer Memory Solutions CM256645300SO 2GB DDR2 667MHz PC2-5300 ThinkPad X61 memory upgrade

SKU CH-6B61-PPY63

2GB DDR2 667MHz SODIMM module for ThinkPad X61 notebooks, 200-pin CL5 unbuffered design

  • Total capacity2 GB
  • Rated speedDDR2 667 (PC2 5300)
  • ChipsetMajor Brand Chipset
  • CAS latencyCL5
  • Memory timings5-5-5
  • Rated voltage1.8 V
  • 2 GB capacity expands ThinkPad X61 memory
  • DDR2 667 MHz speed matches PC2-5300 specification
  • 200-pin SO-DIMM form factor fits notebook slot
  • Unbuffered non-ECC design suits consumer laptop use
  • CL5 5-5-5 timing at 1.8 V operation

Compatibility focus

This 2GB DDR2 SO-DIMM is built specifically for the IBM Lenovo ThinkPad X61 notebook. It matches the factory specifications for models 7673, 7674, 7675, 7676, 7678 and 7679. The module uses a 200-pin interface and runs at 667 MHz with CL5 timing.

Who it suits

The stick is aimed at owners of a ThinkPad X61 who need a single 2GB upgrade and are running a 32-bit version of Windows Vista, where the system limit is 3 GB. Buyers with a 64-bit operating system who want to reach the 8 GB maximum should look at a two-module kit instead.

Deciding specification

The part operates at 1.8 V and is an unbuffered, non-ECC design with a 2Rx8 rank configuration. If the target laptop requires registered memory, ECC support or a different voltage, this module will not work.

How it compares

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

Price $8.99
Cheaper than about 98% of the 21,161 comparable items (median $397.99).
Total capacity 2 GB
Lower than about 95% of the 20,941 comparable items (median 32 GB).
Price per GB $4.50 per GB
Cheaper than about 81% of the 20,941 comparable items (median $8.19 per GB).

New to this? Buying memory and SSDs with crypto — what to check, what it costs to pay, and what is never asked for.

Specifications

Product
Brand nameComputer Memory Solutions
Model nameCM256645300SO
Total capacity2 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 X61 Notebook
In the box
Included items1 Memory RAM Stick

Questions about this item

My ThinkPad X61 has two SODIMM slots — will this 2GB DDR2 667MHz module occupy one slot and leave the other free?

Yes, this is a single 2GB 200-pin DDR2 SO-DIMM rated at 667MHz PC2-5300, so it fills one of the two expansion sockets in your X61.

My X61 runs a 32-bit OS — what usable memory will I see after adding this 2GB stick?

With a 32-bit system the recognised memory may be reduced to 3.0 or 3.5GB depending on configuration, so adding this 2GB module will increase the usable amount within that limit.

After installing this CM256645300SO module, how can I confirm it is running at the correct 667MHz speed?

Check the memory frequency in the BIOS or with a tool such as CPU-Z; it should report 667MHz (PC2-5300) with CL5 5-5-5 timings at 1.8V.

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