Hi,
Checking through the mobo manuals for both revisions of this board, Virtualization Technology (VT) is enabled by default. You should find it in your BIOS under the Advance BIOS features heading.
If you have any doubts, updating the BIOS to the latest version (if you have not already done that) might be an option but, I don't believe you should have to as VT appears to have been an option since the first release.
Hope this helps
ATB