www.crucial.com. I actually just used this on a customer of mine who needed an upgrade of RAM. It gives the model of RAM you need as well as how much RAM the system max's out at. Go to where it says "System Scanner" and click "Scan my computer."
Check that box that says "By selecting this box & clicking the download button, I agree to the Terms & Conditions"
and "Download the Scanner." Run
it, and there it will give you everything you need to know. Hope this helps.
Edited by SenseiHarris, 24 December 2011 - 12:44 AM.