So your CPU IS maybe powerful enough (by the way,from wich generation is your i7 and its speed please ?)
The only thing is the Memory Interface Width of your Graphics Card from 64bit.That can be a "bottleneck" on higher Resolutions than 1280x720.
Thank you for your reply.
Your CPU is strong enough (on Single Core performance which is the main factor of CEMU at the moment).
Please note that higher Resolutions than 1280x720 may fail on your Graphics card because of the limited Memory Interface/Bus width.