ok the final working solution for fan.
just go smart fan and set to manual. for the previous stuff, i just left it at 100 which i had also set to manual. maybe you don’t need to do that, but it seems to be working fine so i left it at that.
the sound is audible but you get use to it. it’s the loudest noise in my networking space that is for sure.
but i also have a solution for this.
popped up my recently purchased Edifier WH700NB noise cancelling headphones. noise all gone 
they are also quite affordable good audio for the price. noise cancelling isn’t perfect, but in regards to cancelling out the qnap fan noise, the noise went from 100% cosn go 0-1% seems very effective to me at least for that.