The Toshiba Memory Module DDR2-533 1GB PA3411U-2M1G is a high-quality RAM module designed for computers and laptops. With a capacity of 1GB per module, this DIMM memory module is ideal for upgrading or replacing existing memory modules in your system. The DDR2 SDRAM technology ensures fast data transfer speeds at a bus speed of PC2-4200 (DDR2-533). This reliable and compatible memory module by Toshiba is a great choice for enhancing your system's performance and efficiency.