Originally posted by O Artem O just asking what is the minimum number of points needed to win an octet tournament.

The situation to win with the lowest theoretical possible points would be if all but one game ended in a draw (yielding one point to each player). All but two players would end up with 14 points one would end up with 13 (the loser) and one would end up as winner with 16 points. (14 games each player seven with white and seven with black)

Originally posted by O Artem O and i just thought of this the lowest will be if every one draw but not counting that situation.(maby were you can only win or lose)

Sorry I hadn't read that post... if only winning and losing games would be possible it will still be the same symmetrical position everyvbody wins with white and one player manages to win once with black. Then we'd have: 24 points to win.
But this situation is as theoretical as the one before.
In fact I know of at least one octet won with 29. (including draws evidently)