Dual boot with two seperate drives

[magicalf22]

I have two hard drives, one is windows 7 pro 64 and the other is windows server 2012. I would like to setup the computer as a dual boot system. (memory is not an issue as I'm increasing from 4 GB to 16 GB

 

[bhagu220]

if you are using these drives in two different computer, then they will not boot in one pc.
you need to install windows again either win7 or win server 2012