iMacs use laptop ram. Getting 8GB DDR3 ram for laptops is expensive, even from newegg: http://www.newegg.com/Product/ProductList.aspx?Submit=ENE&N=2010170381%20

iMacs use laptop ram. Getting 8GB DDR3 ram for laptops is expensive, even from newegg: http://www.newegg.com/Product/ProductList.aspx?Submit=ENE&N=2010170381%201309139890%201309239101&name=DDR3%201066%20%28PC3%208500%29 http://www.newegg.com/Product/ProductList.aspx?Submit=ENE&#3.... $900 from Apple isn't nearly as bad of a markup as you might imagine. side note: I wouldn't buy the G.SKILL ram. Anecdote, but I've had bad experiences with it. Plus, ~half the cost of the closest item makes me suspicious of its quality.