Dell A11598226 | 512MB PC2-5300 DDR2-667MHz non-ECC Unbuffered CL5 200-Pin SO-DIMM Dual Rank Memory Module for Inspiron 1721

Technical Specs:
- Memory Type: DDR2 SDRAM
- Capacity: 512MB
- Speed: 667MHz
- Form Factor: 200-pin SO-DIMM
- Error Correction: Non-ECC
- CAS Latency: CL5
- Rank: Dual Rank

Helpful Notes:
1. This memory module is compatible with the Dell Inspiron 1721 laptop.
2. Non-ECC memory is faster and less expensive than ECC memory, but does not provide error correction.
3. Upgrading your laptop's memory can improve its performance and allow it to run more programs simultaneously.