You don't mention the card make/model, you don't mention where you got the bios, you don't mention how you flashed it. How are people supposed to help you?
By the way, flashing a videocard bios is not a typical thing everyone does. Flashing a motherboard bios, in contrast, while not always necessary, is something relatively common. So if you plan to do things like that then you need to do your research first. One way to know if you've done your research is if something goes wrong, do you already have a plan to deal with it? If not, you need to do more research BEFORE you flash anything.