Is it possible to run a 64-bit OS as a guest on a 64-bit machine with VirtualBox? I'm guessing it should be, but I'd like to make sure.
Do some virtualization technologies allow a single guest machine to use multiple cores? I guess it should be possible, but my VirtualBox open-source edition doesn't seem to do it.
Answer
Yes, you can run a 64-bit OS as a guest with VirtualBox on a 64-bit host.
VirtualBox will definitely allow usage of multiple cores on guest machines, but it depends on your hardware - quintessentially your CPU.
For example, on certain Intel CPUs - especially the Duo Core (Celeron) series, it does not support VT-x technology, and also does not support EMT64 technology, thus you are limited to running only on a single core, and 32-bit guest OSes.
Check your processor, the defining factors are there.
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