de2 board minimum voltage

And yes I can activate the system with less than 9 [v] but their is a catch

at 5 [v] min (although the chip himself is working at 1.2 [v] as I was told) the system is comming to life but in order to burn new programs to the board need we need at least 6 [v] and in order to activate all the sensors and motors and even the communication module that is connected to my system the board needed at least 8[v] weird ... but I guess it could change form system to system