The Komputerbay 4GB (2x2GB) PC2-6400 DDR2-800 DIMM Non ECC Unbuffered Memory is a reliable RAM upgrade for your computer. With a total capacity of 4GB spread across 2 modules, each with a capacity of 2GB, this DDR2 SDRAM memory is perfect for boosting your system's performance. The memory features unbuffered technology and error-correcting code (ECC) for added stability and error detection. Backed by a lifetime warranty from the manufacturer, you can trust in the quality and longevity of this memory module.