The Vintage 512MB SODIMM (2x256MB) DDR2 1Rx16 4 Chip is a memory module set designed for Dell and HP laptops. Made by Samsung and Micro, these DDR2 SO-DIMMs come in a total capacity of 512MB split into two 256MB modules. With a bus speed of PC2-4200 (DDR2-533) or PC2-3200, these non-ECC memory modules are ideal for upgrading or replacing existing memory modules in laptops for improved performance and multitasking capabilities. The compact SO-DIMM form factor makes them easy to install and compatible with various laptops.