I recently inherited a Dimension 8400.  I want to do some Virtualization testing with Hyper-V (and possibly ESX).  I need a processor that will support Virtualization, and a computer that will support the processor.

It is my understanding that the 8400 can support the Intel Pentium 4 662 and 672 processors - is that true?

If I get a 662 processor, will the BIOS be able to utilize the virtualization?  Will I be able to 'enable' it?  I'm in the process right now of upgrading the BIOS from A02 (Which is on it now) to A09.

Thanks for your input!