Do you intend to simply purchase the Ram and put it in yourself? If so, then you should identify where the Ram goes in your laptop, you should open that compartment, you should examine the sticker on the Ram that is currently in your laptop, you should write down what it says on that sticker, and you should use that information to purchase more Ram.
Do you intend to just bring your laptop to a repair shop and allow them to install the new Ram? If so, then do that. It doesn't require any further input from you.
If you REALLY want to insist on using software to identify your Ram, before you actually will be physically examining it, then use CPU-Z (CPUID) for it will not only tell you how much Ram you have and what speed it is running at, it will tell you who made the Ram, the individual product ID of each stick of Ram, what speed it is supposed to run at, which slot it is in, etc.