The ADATA 4GB AD3S1333C4G9-B Memory Card is a high-quality memory module designed for enhancing the performance of your computer. With a total capacity of 4GB and a capacity per module of 4GB, this memory card from ADATA is perfect for upgrading your system's memory. The single-module design allows for easy installation and compatibility with a wide range of systems, making it a reliable choice for improving your computer's speed and efficiency.