I`m soon going to buy a shiny new 15" Powerbook (Superdrive, 1.67ghz, 128VRAM) and the stock 512mb RAM that accompanies it we all probably agree is a little low. Apple is greedy when it comes to buying RAM (over twice the price!) so I`m searching around for alternatives. The "Kingston ValueR DDR SO-DIMM PC2700 1024M" appears to be good value as I found it rather cheap and it looks like a good performer at glance. Adding it to the stock 512mb will bring my total memory up to a nice 1.5gig of ram. But I got some questions in that regard: 1. Will it fit my Powerbook? Do I have to concern myself if it is the right "combination" with my other 512mb? 2. Good value for my money? Any other reccomandations? 3. Does it give good performance? Are there any notable differences between the different kinds of memory chips I can get for my current setup? 4. Is there any noticeable difference between having 1gig of RAM and 1.5? What kind of usage would I need to have to notice the difference? I don`t edit videos nor images (which I take is the thing you would mostly need big amounts of memory for), but will I still experience a difference where I could say "hm, that made a little difference...). I do play games alot... 5. Will having 1.5gig of RAM as opposed to 1gig affect my battery-life? 6. I`ve heard that some people have had problems with the ValueR type from Kingston? Anything you can say about that? Thanks.