How can I improve my fps?

[envisaged0ne]

In average, when dealing with emulation, your computer should be 10 times more powerful than the console you're running.  That can relate to CPU & GPU. There can be other considerations as well, but that's a good starting point.  It would be helpful to investigate how emulators work, so you'd get a better understanding as to why they require so much power from your computer.  My computer is quite a bit more powerful than what you're running, but there are still some games that are a bit laggy for me.