Originally Posted by moshpit
Yes. It would.
Actually not necessarily, or should i say not per say.
Most Intel chipset-based boards support asyncronous dual channel (e.g. 3x1 GB will run in that mode).
There's also flex mode: http://www.intel.com/support/motherb.../cs-011965.htm
I do know running 3 matching dimms does indeed work in asyncronous dual channel on my mobo.
Anyway, realistically though, RAM is cheap enough that'd i'd recommend buying matching pairs anyway, even if running a 32-bit OS that can't fully utilize all of it.