Kingston is the world's largest independent memory manufacturer. In today's performance-driven environment, memory upgrades provide an easy, economical alternative to increase system performance. Every memory product Kingston offers is designed to help you get maximum performance at the best price to you. This memory is designed for the following systems: Sony VAIO PCG-GRX3P; Sony VAIO PCG-GRX500 Series; Sony VAIO PCG-GRX520/GRX560; Sony VAIO PCG-GRX580/580K/580P; Sony VAIO PCG-GRX650/GRX670/GRX690; Sony VAIO PCG-NV209; Sony VAIO PCG-GRX550/GRX570/GRX590.