I know with this dual channel memory you have to install in pairs to get
the best performance. But does that mean the have to be the same
capacity? Or can they just be the same speed? I'm wondering if in my
laptop I can install a 1GB & 2GB DIMM and not see a performance hit, as
long as they are both PC-5300/667MHz. I want to upgrade from my current
2GB (2 x 1GB), but I'm not sure about buying two 2GB DIMMs just yet...
thinking prices are going to fall still.

"Mostly me, mostly you."