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Do VirtualBox or VMWare use the Intel VT-d feature?

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linux-howto

http://unix.stackexchange.com – I'm thinking about a new laptop, which has Intel VT support, but recently I discovered a feature other than Intel® Virtualization Technology (VT-x), which is Intel® Virtualization Technology for Directed I/O (VT-d). Is VirtualBox or VMware taking advantage of it? How much performance increase can it bring when I use VirtualBox or VMware? There's an link explaining CPU features (HowTos)