I know there is a way to disable the onboard card and I forgot how. I want to do this because my 7600gt and I don't want the onboard card to be used and take up RAM
It wouldn't be locked up, just press, either ESC, F12, or something like that..it'l be there somewhere, what kind of pre-built computer is it? As in, which make, DELL, HP?
Companies can't go around and lock up your BIOS. What do you mean by lock up? Did they throw a password on it? If so then you can either call them or use their backdoor password. Every company puts one on the BIOS.
And Marx I don't think it does that..... I could be wrong though. When I installed my friends gfx card we had to switch it.