RAM

of all components in a notebook, a large installed RAM will have a very important effect. the greater the RAM, the faster all applications will run. 

             This time, memory capacity of 512MB is the minimum, and it is advisable to have a 1GB, especially if we are running windows vista. if we run a lot application / multitasking, you should upgrade to 2GB. there is no noticeable difference between 533MHz and 667MHz and the RAM is the easiest component in the upgrade, we can even do it yourself.