RAM memory upgrade

I have an iMac 2009 end 27 "running iOS 10.7.5.  Can I replace the four slots of RAM with 4 gigs each card to replace my two 2 Gig cards without losing anything on the hard drive of my computer?  My computer starts to become slow and I guess having more RAM will increase the speed.  I'm on the right track?

Yes, you can. Save the data anyway.

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Tags: Mac

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