The memory can't be upgraded, and on Dell.com the difference between 4GB of RAM and 8GB of RAM is $200. If you know your usage and don't expect that to change drastically any time soon, just go with the 4GB. On my main computer I have 8GB of RAM, but on my secondary one I only have 3GB. I was going to upgrade it, but after trying it out as it was, I realized I didn't need it. Don't let people tell you that you need X amount of RAM based on their own usage.