My PC is 8 core 4.6ghz with 4gb video ram along with 8gb normal ram.
but I though it may be possible to emulate just that one game since its not very graphics intense.
for example, on my macbook pro, I can emulate New super mario bros wii at full speed, but no other games, because NSMBW is not very graphics intense.
You don't understand how emulation works
In essence, your cpu speaks a different language than the game and the emulator serves as the translator. Slow emulation tends to be the result of "bad translation" while fast emulation is "good translation"