On my BIOS I have to tell it I have a new HDD installed. Well I don't have to tell it but if I do it makes life easier. Basically in the drives part of my BIOS there is a list of drives I have connected.

Just scroll down to the Primary Slave and press enter (normally) and it will find the settings, size etc of the drive just installed. Also booting the PC into Cmd prompt mode to format the old drive might be a good idea.