yeah its very possible i did it for bout a week once, built my 1st comp and when it was in the case it turned on for 5 - 10 seconds then turned off,
so i took it out of the case built it up in the mobo box and it worked, then put in back in the case and it cocked up again,
so becuase i just wanted to test my pc i ran it out the mobo case lol,,
************stupid me forgot to put the motherboard raisers in, *************