Answer Description
If your processor does not support virtualization you cannot run VMs on the server. Hyperthreading and multicore processors are nice-to-have but not essential. Dual voltage options are for power supplies, not processing.
Wikipedia
In computing, hardware-assisted virtualization is a platform virtualization approach that enables efficient full virtualization using help from hardware capabilities, primarily from the host processors A full virtualization is used to simulate a complete hardware environment, or virtual machine, in which an unmodified guest operating system (using the same instruction set as the host machine) effectively executes in complete isolation Hardware-assisted virtualization was added to x86 processors (Intel VT-x or AMD-V) in 2005 and 2006 (respectively) Hardware-assisted virtualization is also known as accelerated virtualization Xen calls it hardware virtual machine (HVM), and Virtual Iron calls it native virtualization
Hardware-assisted_virtualization - Wikipedia, the free encyclopedia