The RAM from PHS-memory is specifically designed for the Sony VAIO PCG-9Z1M model and offers a storage capacity of 4 gigabytes. This DDR2 RAM is equipped with a memory clock frequency of 800 megahertz (MHz) and uses the SO-DIMM form factor, which is suitable for laptops and compact systems. With 200 pins and a voltage of 1.8 volts, this memory ensures reliable performance and compatibility with the corresponding device. Installing this RAM module can enhance the overall performance of the system by enabling faster data processing and smoother multitasking. Ideal for users looking to optimize the performance of their Sony VAIO laptop, this RAM provides a simple and effective solution for upgrading the memory.