The cpu is pretty outdated, even at 4.1Ghz that would be equivalent to a 2.1~GHz 7000 series i5/i7. even lower on 8000 series.
Every generation after the 2000 series is about 10% increase per clock per core, (the jump from first gen to second gen was a pretty big leap, 25% or so) so basically, if you take a 7600 i5, that is about 95% faster per clock than your i7. To make math simple, that would mean a 2.1GHz i5 7600 is about as fast per clock per core as your 4.1GHz i7 per clock per core.
Taken this into account, your CPU is quite weak for emulation past 4th gen emulation (baring wii, that is pretty much a shared 4th gen)
So don't expect miracles from the emulator running good on your hardware any time soon.
Also dq8 is a pretty light game, try 7th dragon or mariokart, those games a re a lot more demanding and put a more realistic view on the load of citra