I've recently bought an 20" imac with 1gb ram, but i wanted to upgrade it to 2gb. Have I to buy 2x 1gb ram or just 1x 1gb (because 1gb is already inside) ?
I believe the iMac you are talking about has 2 slots both with 512 mb of ram in them. So you will not be able to reuse them. You should get 2 1 gig sticks
I'm just about to upgrade my mac with an extra 2gb to add to the 1 gb I have already. Does it matter which way round they go? i.e. does the 2gb have to go in the slot that is currently being used by the 1gb ram?