yes cuz the psu inside your computer is a DC constant voltage type.
The amperage fed to each line is variable and can handle up to 15 amps typically or greater.
That means u can daisy chain as many fans as you want on that one molex going directly to your psu as long as u dont exceed the 15amps, because at higher amperage u will burn the wire out.
The average fan pulls arround .15-.25amps..
so yes thats a lot of fans u can daisy chain.