Which core did you use? If you use the accurate one, than you need a serious CPU, but with your rig, it shouldnt be a problem, to run it at 60FPS.
There are only two cases / games, where you would need that accuracy. All other games can be played superb with the balanced core.
If you cant run it well, than this is your own problem, because hundred of thousands users will not agree with you, including me .
Please dont talk lame about emulators, that you all cant setup properly. those developers deserve much more credits and not your "bad talk" (without any knowledge) about their emulators.