umm not being smart here but u do relize u have to soft boot
most blizzrd ppc cards to get them to the hard drive to spin up and load.
also u need to be using a pc power supply or at least a 500 one.
have you cehcked the setting in your ppc startup screen
by holding escape when booting my ppc card refused to work with my orginal 1 D 1200 motherboard so l got second hand one.
id check your memory sims on your blizzard card are seated right and metal clips secure
hope u sort it soon.
:-)