I remember the requirement for VT-d
1. Chipset with VT-d support.
2. Enable the VT-d in BIOS.
thanks for your reply, but this spec only says that this processor support 'Intel Virtualization Technology'. That could mean a lot of things. VT-d is only a part of it and it's not guaranteed that it's included if Intel is talking about 'Intel Virtualization Technology'.
the chipset itself should support VT-d, it's an Intel Q35 chipset. (see http://software.intel.com/en-us/forums/virtualization-software-development/topic/56802/). I have opened another request at Tyan and asked where to enable VT-d. At the bios is only a general 'Intel Virtualization Technology'-option. Don't know if this also enable VT-d.