I have an Inspiron 580s motherboard. It came in a Dell Inspiron 580 but has had some changes. I took it all out of the old tower and put it into a new case with a 500w power supply and an EVGA GeForce GTX 780 Classified graphics card. The motherboard had an Intel i3 processor. I was wonder if I could switch out that processor with an i5 or even an i7 but still keep the same motherboard and not having to reinstall Windows 7. Please help.