Disable case fans at idle

[Tupro]

Just wondering if turning off the fans while my pc is idle would cause anything to overheat?

cpu + gpu fan would remain running and they are silent at idle anyway
but with the case fans being filtered they produce a bit of noise..

this is mostly wanted for when i download overnight or something

 

[Tupro]

yeah i might give it a go one night then, even with no real airflow the temps surely wouldnt get too high while idle anyway would they?

 

[Tupro]

no overclock on anything
running haswell i5 4670k

and no its not loud at all really, got my fans at 600-700 rpm
its more just a case of preferring silence when sleeping, im a pretty light sleeper so doesnt take much to wake me up

probably just one of them things i will have to deal with as id rather not risk it then