This is the best site, http://www.crucial.com/ simply type in your make/model and it will tell you what you have and what you can upgrade to, also the price, they are very reliable, and take 2 days to deliver to your home. I use them all the time, as do many other people.
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Go to crucial.com. They have a tool that will scan your laptop and tell you how much RAM it will take.
http://www.crucial.com/index.aspx
Looks like it will accept 8GB (2x4GB).
This is the best site, http://www.crucial.com/ simply type in your make/model and it will tell you what you have and what you can upgrade to, also the price, they are very reliable, and take 2 days to deliver to your home. I use them all the time, as do many other people.