i am upgrading my memory and i want to get 2 gigs and i have 512 that im going to sell can you tell me which one is the best and which one should i get
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http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=1056177&CatId=0
http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=1071040&CatId=1649
http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=1071042&CatId=0