On 14.07.2011, at 18:57, Peter Korsten wrote: > Hmm, my machine has 6 GB of RAM, of which usually some 2 to 3 GB are in > use. Once you start up a VM, those extra GBs come in handy. I think 64bits is about using a contiguous chunk of more than 4 GB of RAM -- not just addressing more than 4GB altogether. That has been possible even in 32 bits. Or so I think..;) Kai