That might also answer my real question, which is: Does it make sense to install VirtualBox's optional Direct3D support when the Windows guest OS is hosted in a headless FreeNAS system?
I've been trying to accelerate the sluggish video and screen updates on my virtual PC, and was greatly encouraged by the VirtualBox manual's discussions of its Direct3D support. My FreeNAS system does have a decent 3D graphics card in it, although FreeNAS itself doesn't care. If that card could accelerate the virtual PC, great. However, I'm slowly catching on to the fact that many VirtualBox installations are on "normal" PCs with an attached screen/keyboard/mouse, not a headless machine like mine. I'm wondering if this magical Direct3D support really only applies to PCs and not headless servers.
In other words, if I'm accessing my virtual PC remotely using VNC or TeamViewer, it's always going to be very slooow.
Thoughts?