Starting with Version 2.0, VirtualBox also supports 64-bit guest operating systems.
Starting with Version 2.1, you can even run 64-bit guests on a 32-bit host operating system, so long as you have sufficient hardware.
In particular, 64-bit guests are supported under the following conditions:
- You need a 64-bit processor with hardware virtualization support (see the section called “Software vs. hardware virtualization (VT-x and AMD-V)”).
- You must enable hardware virtualization for the particular VM for which you want 64-bit support; software virtualization is not supported for 64-bit VMs.
- If you want to use 64-bit guest support on a 32-bit host operating system, you must also select a 64-bit operating system for the particular VM. Since supporting 64 bits on 32-bit hosts incurs additional overhead, VirtualBox only enables this support upon explicit request.
On 64-bit hosts, 64-bit guest support is always enabled, so you can simply install a 64-bit operating system in the guest.
Warning
On any host, you should enable the
I/O APIC for virtual machines that you intend to use in 64-bit mode. This is especially true for 64-bit Windows VMs. See
the section called “"Advanced" tab”. In addition, for 64-bit Windows guests, you should make sure that the VM uses the
Intel networking device, since there is no 64-bit driver support for the AMD PCnet card; see
the section called “Virtual networking hardware”.
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