Not all processors in the 830 have the Intel Virtualization Technology. I would gather that if the option isn't in the BIOS, you don't have a PROC that has that support. Which PROC do you have?

Intel Pentium D CPU 3.00 GHz

CPU Information From BIOS:

Bus Speed - 800 MHz

Demand Based Power Management - Disabled

Processor 1 ID - F47

Core Speed - 3.00 GHz

Level 2 Cache - 2 X 1 MB

Number of Cores - 2

64 Bit Technology - Yes (Intel EM64T)

This is the website which says PowerEdge 830 is supported:

http://www.windowsservercatalog.com/item.aspx?idItem=94f2c965-de18-68f2-8650-a9b5c39c8bce&bCatID=1333

This is another discussion forum in which one guy says he is using PowerEdge 830 with Hyper-V.

http://209.85.229.132/search?q=cache:yd7Mmt95ZXgJ:www.experts-exchange.com/OS/Microsoft_Operating_Systems/Server/Windows_Server_2008/Q_24076569.html+PowerEdge+830+Processor+and+Hyper-V&cd=2&hl=en&ct=clnk&gl=uk

Thanks

            Mohan

Download CPU-Z and run it. It can tell you the capabilities of your processor.

As you can see here, the Pentium D 830 (3 GHz, 800MHz FSB) doesn't have VT, and as you can see here, the Pentium D 925 doesn't have VT, but the Pentium D 930 does have VT (both 3GHz and 800MHz FSB).

Thanks for the information.