3 sticks of 1gb each ddr3 new tri channel memory 30.00 firm came out of this computer i bought when i added 12gb of memory
http://www.bestbuy.com/site/olspage.jsp?skuId=9081325&type=product&id=1218017465909
http://www.bestbuy.com/site/olspage.jsp?skuId=9081325&type=product&id=1218017465909