I wanted to upgrade my ram on another imac my family has. Its a 2GHz intel core 2 duo (20", model iMac 7,1) If my memory serves me right it was the first gen. aluminum imac. When I go to about this mac I have 1 gig of 667 DDR2 SDRAM. What is the maximum about of ram the computer can handle? I think it was 4 but I want to make sure before ordering. Is this the correct package? http://www.crucial.com/store/mpartspecs.aspx?mtbpoid=B06FE609A5CA7304 Thanks!