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Green circuit board SODIMM memory module with black chips 200 pin DDR1 266MHz

Computer Memory Solutions

Computer Memory Solutions 1GB DDR1 266MHz SODIMM CM128642100SO memory upgrade

SKU CH-8YBJ-GJ09W

1GB DDR1 266MHz SODIMM memory upgrade for Dell Inspiron 1100 notebooks

  • Total capacity1 GB
  • Rated speedDDR 266 (PC 2100)
  • ChipsetMajor Brand Chipset
  • CAS latencyCL2.5
  • Memory timings2.5-3-3
  • Rated voltage2.5 V
  • 1GB DDR1 266MHz upgrade for Dell Inspiron 1100
  • 200-pin SODIMM fits legacy notebook memory slots
  • CL2.5 2.5-3-3 timing for stable DDR266 operation
  • 5V unbuffered non-ECC module matches original spec
  • Lifetime warranty from Computer Memory Solutions brand

System-specific DDR1 SODIMM for Dell Inspiron 1100

This 1GB module uses 200-pin DDR1 technology running at 266MHz with CL2.5 latency. It is built as an unbuffered, non-ECC stick rated at 2.5V and validated for the Dell Inspiron 1100 notebook series. The single-rank 2Rx8 design fits the original memory slot without modification.

Passive operation with standard DDR1 voltage

The module draws power at the stock 2.5V specification and has no heat spreader, relying on the notebook's existing airflow. Because it is unbuffered and non-ECC, the electrical load matches the factory memory, so fan behaviour and battery runtime stay unchanged. No additional cooling or BIOS voltage tuning is required.

BIOS upgrade A32 enables full capacity recognition

The supplier notes that the system BIOS must be updated to version A32 before the notebook will recognise the full 1GB capacity. The second memory socket may be located under the keyboard, which could affect installation access. The kit contains only the memory stick; no tools, adapters or software are bundled.

How it compares

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

Price $17.99
Cheaper than about 92% of the 21,161 comparable items (median $397.99).
Total capacity 1 GB
Lower than about 98% of the 20,941 comparable items (median 32 GB).
Price per GB $17.99 per GB
Pricier than about 64% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameComputer Memory Solutions
Model nameCM128642100SO
Total capacity1 GB
Product type200-Pin DDR SO-DIMM
Performance
Rated speedDDR 266 (PC 2100)
Processor
ChipsetMajor Brand Chipset
Memory
CAS latencyCL2.5
Memory timings2.5-3-3
ECC supportNo
Buffer typeUnbuffered
Memory rank2Rx8
Heat spreaderNo
Power
Rated voltage2.5 V
Compatibility
Compatible systemsDell Inspiron 1100 Notebook Series
In the box
Included items1 Memory RAM Stick

Questions about this item

How do I install this 200-pin DDR1 SODIMM in a Dell Inspiron 1100 and what step is often missed?

Power off, unplug and remove the battery. Locate the SODIMM slot — one may be under the keyboard. Insert the module at an angle until the contacts disappear, then press down until the clips click. The step often missed is applying the BIOS A32 upgrade before booting, otherwise the system will not recognise the full 1GB.

What maintenance or replacement will this CM128642100SO module need later?

The module itself has no moving parts and requires no scheduled maintenance. If errors appear, reseat the stick and clean the gold contacts with a soft eraser. Replacement is only needed if the module fails or if you upgrade to a newer platform that no longer supports DDR266.

What limit appears first when this 2.5V DDR266 memory runs under sustained load?

The CAS latency of CL2.5 and 2.5-3-3 timings set the access-speed ceiling. Under continuous heavy use the memory controller reaches its bandwidth limit at 266 MHz before thermal throttling becomes a factor, since the stick has no heat spreader and operates at standard 2.5V.

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