Question getting like around 48fps in AC Syndicate with my spec : rx580 12gb ram and i5 6500

[helpmegetgud]

this is normal to get fps like this with my spec ? pls answer !

 

[rgd1101]

try different resolution/detail?
make and model of the psu?
what the cpu/gpu temp and usage during the game?
12GB ram? sure they running correctly dual channel?