actually i think 32-bit os's support 8gb of memory, but 64-bit os's in theory support 16billiongb's. and is it time for vista for me i have tried it and the answer is no, drivers suck and lots of software doesnt run well or even run yet. my prediction vista will never be safe, just like xp which is delivering new patches every week. i may get vista again but by that time Vienna would already be out