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Curently i have 8GB RAM, i want to upgrade to 16GB. What type of ram would you recommend?
Yes, you can upgrade it. I suggest you match the exact one in there. Likely you have 2x4gb DDR3 1066mhz. You will need to upgrade to 2x8gb of exactly the same speed you are currently using. For the most part most high quality brands work (i.e. hynix, samsung, crucial, micron, etc). Teardown guide is here. MacBook Pro 15" Unibody Mid 2010 Teardown