Pretty much what the title says. Lately I've been noticing that I'm getting too close to use all of my 4GB of ram and have to close some stuff in order to lower ram usage a little. Other than that games are starting to ask for more than 4GB so I guess that while I can upgrade the rest at least upgrade the ram and use it when I change the other parts. The question is how good idea is to have something like 12GB of ram? I usually hear that people go on increments of 4, 8, 16, 32 (always doubling the previous amount). Also if I have 2 bars of 2GB each, is a good idea to use one with 8GB or better stick to another 2 of 2GB and get 8GB in total?