Call Of Duty 4 Modern Warfare [BLES00148]

I'm new to RPCS3 and playing Call of Duty Modern Warfare 2 for the first time ever. Sometimes I can get through a mission but most of the time it freezes and I have to close it and restart. Any tips on settings to get this game playing smooth without freezing or crashing? I tried Grand Theft Auto V but that's barely playable, constantly slows down, loud noises, crashes, etc... 

My pc specs are
i7 6700K 4.0ghz
evga geforce 1070 sc
16gb ddr4 ram
4k tv 60fps

Call of Duty Modern Warfare 2 [BLUS30377]