According to http://www.intel.com/support/motherboards/desktop/sb/CS-030922.htm Desktop Boards — Compatibility with Intel� Virtualization Technolog
the DZ77BH-55K board has support for VT-d (directed I/O).
But how is this possible when the board's Z77 chipset doesn't have support for VT-d?
There are OEM (Original Equipment Manufacturers) versions using the Z77 express chipset and those do not offer support for Intel® Virtualization Technology so the information on "ark" is correct. We can confirm all Intel boxed motherboards using the Z77 express chipset offer support for VT-d (directed I/O) as described on the website you provided as well.
This is still confusing. Is Intel using a different version of the Z77 chipset than what is used by OEMs like Asus, Gigabyte and others?
Or is the chipset not involved in the VT-d functionality and it is rather up to BIOS and other parts of the motherboard to implement this?
it is stated that the PCH (Platform Controller Hub) for the entire 7-series and C216 chipsets support VT-d. There are differences between these chipsets listed on page 54 (RAID support, management tech, etc) but there is no mention that VT-d support should differ.
Are you really saying that it is correct that VT-d is specified as supported for
but not for
If the above datasheet pdf is correct, Ark should state that VT-d is supported for all chipsets covered by it.
Actually is the same chipset but with certain customizations based on the OEM (Original Equipment Manufacturers) specifications. We will proceed to confirm this information and will post soon with further updates.