I am in middle of new build.. Anyway have it booted into cmos but noticed the case fans on the antec 300 are not running.. do they suppose to run all the time or just when temps call for it? In cmos it tells me system temp is 38c and cpu 32c.. This is ex58 ud4p and core i7 920 system... Inside the cmos it is also saying the case is open/... Will that affect the fans from running?