If AFTER you plug in the power to the card (which it NEEDS to run properly) you still have problems, then you can try updating your bios.
In order to help you find your updated bios files we need to know what kind of motherboard you have.
If you don't know the make of your motherboard, download CPU-Z and run it on your computer. You can google for the software, or go to the "download" section of this website.