yes, all computers have SOME kind of bios access. I recently installed an FX550 into a Dell. The options in the Dell were this.
Onboard Video: Off
Automatic
So, what I did was put it on automatic, which is what is was anyway... The machine detected the card in the PCI slot and away it went. So in your bios, you're going to want to put it on a setting that suggests you installed your own card. Any questions, post back here.
Ryan