I'm purchasing a Dell laptop and I'm going for the 1GB of memory. It was suggested (obviously) to see if the 1GB is a single chip because that leaves the other slot open for extra memory (down the road). FYI, I'm getting a Dell Inspiron E1705, which does have 2 memory slots. I'm getting this installed in the system: 1GB Shared Dual Channel DDR2 SDRAM at 667MHz Now I'm not sure if it's one 1GB chip or two 512MB chips. As I did some research, I found this on Dell's site:Now it sounds like having two 512MB chips may perform better than one 1GB chip? Is this true? I assume it has to do with the fact that they are 'dual channel'? If the above is true, while both slots would be taken, I may have better memory performance, so as long as I don't really plan on upgrading memory, I shouldn't be concerned if there are two 512's? Can anyone make sense of my ramblings? Obviously having two 512's means that they'd both need to be replaced if I ever wanted more memory, but I really don't see that happening as I use my desktop as my 'workhorse' - the laptop is just for 'fun' stuff.