I've just installed Vista 64. There is 4GB of RAM in the machine and 2.81GB are "available" (i.e., usable). This is disappointing, though not entirely unexpected. So, may I ask: (1) Does Apple's motherboard/firmware implementation support memory hoisting? (2) Are the memory figures reported by Activity Monitor accurate? That is, is it reporting back the amount of usable rather than the amount of physically installed RAM? Cheers!