Stacked vs Non-stacked RAM
I am looking to get 2 x 2gb RAM modules for my Macbook Pro, and I have seen on the Ramjet site that their memory is "non-stacked" and therefore uses less power. Ramjet RAM is expensive and shipped (rather expensively) from the US to the UK though, so I was wondering if anyone knows other brands of RAM that use non-stacked chips. Failing that, is there a way you can tell by looking at the chips themselves?
Macbook Pro 2.4ghz, Mac OS X (10.5.4)