Google found 2 more guys having boot problems similar to mine:
And jeffmd, I know but nvidia managed to change that, interrupt problems with GTX 460 (caused by the too aggressive low power management, so they can be competitive with ati cards):
And when I had the card, I had some strange sound lockups, I seem to be affected by that as well...
It seems that I purchased the most buggy card ever released... Bad time to come back to nvidia...
Gigabyte hasn't answered to me yet, I am trying to get refund for this crap that was released out of desperation by nvidia.