Hey quick question, I need to upgrade memory on a Dell Inspiron Notebook i have had. I went searching to see what kind of memory it can handle, you know whats the fastest. I found a lot of conflicting numbers, the computer currently has PC2 4200. I found on dell that it supports PC2 5300 and PC2 6400. Well other sites say it takes PC2 4200 and PC2 3200. I am so damn confused can anyone help me out