RAM memory is volatile.
That means, everything stored in RAM (Random Access Memory) is gone when you shut your computer down. Everytime you start your computer up, the RAM starts filling up with the programs that you run.
To understand how RAM works, imagine your going to do a project on your kitchen table. All of the materials you need for the project are in your closet. If you keep going to the closet to get what you need, when you need it, this is going to be time consuming for you. On the other hand, if you get everything out of the closet and put it on the table, close to where your going to do your work, then it will be much more efficient. Your computer works the same way. It gets the program information from your hard drive and puts it in RAM, so it can work with it more efficiently. If it has to work with a program from the hard drive, then it is going to be slow.
When your RAM memory is full, it just means that you have so many things running at the same time. Your computer then has to work with "virtual memory", which is a temporary RAM space it creates on your hard drive.
When you shut your computer down, RAM is cleaned out, empty.
So you see, neither of your 256 modules have "less" memory. They both have 256MB available.
If you have extra slots, just add the 512MB. (assuming it is compatible)
If you have to remove a 256, it does not matter which one you remove.
I am not sure what you mean by emotions ext.
Edited by PsychPosse, 26 October 2007 - 10:11 PM.