I am thinking of swapping my old motherboard for a Gigabyte GA-X58A-UD3R Intel X58. My motherboard i have just now came with a pre built system from pc world and theres no info on my board. All i know is its acer. So if i swap my boards will i need a new operating system because i dont know if my vista x64 is oem or not and if i do will a Windows 7 Home Premium (Upgrade) Operating System, Retail work?