40Y8401 - IBM 256MB DDR2-667MHz PC2-5300 non-ECC Unbuffered CL5 200-Pin SoDimm Single Rank Memory Module

Technical Specifications:
- Memory Type: DDR2 SDRAM
- Memory Size: 256MB
- Memory Speed: 667MHz
- Memory Standard: PC2-5300
- Form Factor: SO-DIMM 200-pin
- CAS Latency: CL5
- Error Correction Code: Non-ECC
- Rank: Single
- Voltage: 1.8V
- Technology: Unbuffered
- Data Integrity Check: Non-parity
- Pins: 200

Helpful Notes:
- This memory module is compatible with select IBM ThinkPad and Lenovo laptops.
- DDR2 memory is slower than DDR3 and DDR4, but still useful for older systems.
- Upgrading your laptop's memory can improve overall performance and multitasking capabilities.