Problem with slow POST Help?

I bought new video card before couple of days, and I have a problem. When I installed the video board in my MoBo and rebooted the system the POST (power on self test) was terribly slow. Before it passed for seconds, now it needs around 10-15 minutes. I tested the video on my neighbour's PC, and it worked with no problems. What is the reason for this? Do I need to change my MoBo?
