The option to overclock lumped in the volume adjust menu which you can acess by default with the tilde key (`). One problem is that the overclock does not save so you have to do it everytime. I think that the overclock is most useful for games like neo geo doube dragon 2 that actually were choppy on their native hardware. In your case, it would probably be worth a try, but I am not sure if it would solve the prob.