Can I play with an I5-750 CPu?

hi I tried to use rpcs3 emulating god of war collection.
the game starts but is afflicted with lag, and the audio is distorted

this is my hardware

Intel I5 Quadcore 750 OC 3.2ghz
8 gb ram
R9 270X

Is there anything I can do or is the CPu too old?

thank you and sorry for my english I'm italian