Adorama PC2700 Memory Module Card, 1GB, DDR-333 SDRAM, for Windows.

• RAM is the lifeblood of your computer. The more you have, the more you can do. Simply put: acquire as much RAM as you can afford. Modern operating systems such as Microsoft Windows XP and Apple Mac OSX require much more RAM to run effectively than older operating systems. 256 MB of RAM is the most popular, but there is also 64 MB, 128 MB & 512 MB. DDR-SDRAM is closely correlated with your computer's system bus speed. Always be sure the memory cards you are buying are fully compatible with your OS. If not, the system profiler may not recognize the installed memory.