Second 6950 is not detected by device manager.

Dude you accept what you get! If the board is only six months old request an RMA! And get on the phone and talk to someone, not send a voiceless, emotionless e-mail.

It's up to you.

Good luck.

you right, i was thinking about selling it and than just getting sandy bridge but i might just call them tomorrow and tell them to give me a new one.
but do i have that right?

If the board is still under warranty you have a right to request a working board! If you let customer service push you around, they will because they know people get frustrated and say forget it. In the end it costs them nothing since they can get away without honoring a warranty they gave you when you bought their product.

You can get your point across without being rude and still make them honor their warranty. Just be persistent and call and speak to someone. E-mails are emotionless and take time to answer. A phone call is immediate and has impact. If after that you feel you're getting the run around, send an e-mail documenting the issue(s) and that you're getting not help. Trust me they'll respond more positively than negative as they don't want the negative press you have with your e-mail you sent (after your phone call).

The key is to be cool, calm and collective. Trust me, it works.

Anyway it depends on how important the issue is to you so.....