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Originally Posted by DrPepper
I just read it up and apparently it allows you to run microsoft virtual pc and vmware. I wasn't aware that you needed a specific instruction set to be able to run those programs.
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You don't need it, all it does is speed things up. I'm not sure about Vmware, but I know Virtual PC emulates something like a 500MHz Pentium(not sure on exact specs). With VT, the virtual machine has direct access to the CPU, so whatever you have in your PC, your Virtual PC has access to also. Of course with Virtual PC, it only gives access to a single core, if you have a multiple core system, but it is still a lot better than whatever the emulated processor is.
It doesn't really affect basic tasks, it is really only helpful for people that do a lot of CPU intensive work in virtual machines.