hello. i have a new mac mini. this one: http://store.apple.com/us/browse/home/shop_mac/family/mac_mini?aid=AIC-NAUS-K2-BUYNOW-MACMINI-INDEX&cp=BUYNOW-MACMINI-INDEX (its the latest cheaper version) it came with 2 gb of ram, 2 slots of 1 gb. i bought 1 slot of 2 gb and put it instead of one of the original 1 gb slots. it should have 3 gb in total now. my new is Kingston 2gb memory pc3-8500. it writes me i have only 2 gb. why is that? isn't it possible to have 2gb + 1gb = 3gb? should memory slots be same size? thank you.