: Ensure you select DIMM (240-pin) for desktops or SO-DIMM (200-pin) for laptops.

A reliable 240-pin desktop memory module. Kingston's ValueRAM line is known for meeting JEDEC specifications for broad compatibility. You can find various configurations at eSaitech .

A comprehensive upgrade for desktops with four memory slots. It's a non-ECC, unbuffered kit available on Newegg. OWC 4GB DDR2 667 Memory Newegg.com - OWC& more Go to product viewer dialog for this item.

A-Tech 4GB (4x1GB) DDR2 667MHz DIMM PC2-5300 UDIMM Non-ECC 1.8V CL5 240-Pin Desktop Computer RAM Memory Upgrade Kit Newegg.com - A-Tech Go to product viewer dialog for this item.

A high-capacity option for select laptops that support 4GB modules. This kit is frequently used for Mac upgrades and can be purchased at Best Buy . Quick Buying Checklist

An ideal choice for laptop upgrades, this 200-pin kit is designed to improve multitasking and system responsiveness. It is available from retailers like StarMicroInc.Net .